Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9d8d3049056f27…

MALICIOUS

PDF

130.5 KB Created: 2021-05-26 13:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9471d16efdeea5319fc1b02a02945093 SHA-1: cc3a316ccada448fd262d0d25e6e4692563b2ee0 SHA-256: ab9d8d3049056f27eee986b1179a1ec0ce60b9a270f23902e2f8cc44b6977d2b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. It contains numerous external links, including one pointing to 'https://zajinet.ru/strik?utm_term=bollywood+mashup+song+free+mr+jatt', suggesting an attempt to redirect users to potentially malicious content. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9678

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/strik?utm_term=bollywood+mashup+song+free+mr+jatt PDF link annotation
    • https://kadogejajufa.weebly.com/uploads/1/3/4/7/134717900/3439350.pdfIn PDF document text
    • https://serijarivak.weebly.com/uploads/1/3/0/7/130776739/nunutapufowe-dutezaja-bakuguja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419225/normal_5fee0dfea12c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_6033c861eef2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393190/normal_602a9b6bad49c.pdfIn PDF document text
    • https://jomigivava.weebly.com/uploads/1/3/5/3/135330213/fiwiloseguzazuf.pdfIn PDF document text
    • https://dawopurasujup.weebly.com/uploads/1/3/0/7/130775219/66fb735906e0a08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490754/normal_602062420fede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377925/normal_5fd31cb878ce0.pdfIn PDF document text
    • https://zikamesezelili.weebly.com/uploads/1/3/4/8/134857079/aefd7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_60505872d48ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501041/normal_6068a83fc8f40.pdfIn PDF document text
    • https://fokomawirofuteb.weebly.com/uploads/1/3/0/9/130969657/1002024b4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_60175ee9a02bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_6026dcb5d0340.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/6322746.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390383/normal_5fc62d5273b61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ec0eb765-9cd0-45f1-95e7-1cb684f9403e/why_isnt_my_vizio_tv_showing_up_on_airplay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb1e61a-f2d9-43e8-a0e8-071063fd96ae/vegebirileguliko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f879cd5b-d11c-49c9-ba14-96eb2d45e181/1860760079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d5b98b-9a71-4c82-923d-47b950622a25/gezadipesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e241bf0e-9658-4553-b8a0-2016208e4e6a/kogukapajaxen.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C87 3532 bytes
SHA-256: 30ef448bcc86ee3a87000081f66c1c32fd4a70ccc9e3473cf4390073796d6a01
font_01_sfnt_off00016950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16950 5608 bytes
SHA-256: 26878a74754b5cd4a50504c50f9457083e88c35dbff3c335a6c9985b8ff543db
font_02_sfnt_off00017c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C59 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_03_sfnt_off000187bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187BC 2384 bytes
SHA-256: ca5c59e2009ace45eb4563d383ac09a797791e5b55d42daf549bb88ee2d67bcf
font_04_sfnt_off00019225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19225 13248 bytes
SHA-256: 257d15eed390df99c65ae2c2999bb23d92c8da683dec44ff30e98e8f611acabe
font_05_sfnt_off0001bdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDCB 16276 bytes
SHA-256: 794cec896c7e5c1bb905cf94c81173a80bc5132b1b6c0ab7076c595311e9aaf9
font_06_sfnt_off0001d353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D353 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
font_07_sfnt_off0001e153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E153 6980 bytes
SHA-256: eb120eb47fe79791efb8703b3ec57612e06f7d1a0c1661a90c2390156713c5b0

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