Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d36bd89d5f0071…

MALICIOUS

PDF

96.9 KB Created: 2021-06-06 23:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 54bffc281f88de00cce01750ca7f02b8 SHA-1: cbcac09ff8248b875a99f9666f8b7e1f74ee3b9b SHA-256: a4d36bd89d5f00717d985ced74d4539f354bab7768065bb672711154cc7e07d5
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains a large number of external links, indicating it is part of a link farm designed to direct users to potentially harmful websites. The primary URL leads to a page that appears to be a lure for downloading MP3s, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://crewmak.ru/pbw?utm_term=odia+film+diwana+song+mp3+download PDF link annotation
    • https://tibirodemoxojuf.weebly.com/uploads/1/3/4/3/134336787/zabopibilakawok.pdfIn PDF document text
    • https://kisigiwozenire.weebly.com/uploads/1/3/4/7/134730423/mekaxetapazebot-tozanapezajuren-xisuvugu.pdfIn PDF document text
    • https://riwinuwozobama.weebly.com/uploads/1/3/4/8/134868589/bofanotika.pdfIn PDF document text
    • https://manumuxalobo.weebly.com/uploads/1/3/5/3/135387638/785477.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najajadux.pbworks.com/f/kidov.pdfIn PDF document text
    • http://nipekari.pbworks.com/f/2003_mercedes_c230_kompressor_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b83106b-1e2a-4d7f-8e9c-d4c9b2cef1bb/jozeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9235271-7c3a-4161-8d01-703b0ef65de9/vegopamejajumigad.pdfIn PDF document text
    • http://nidibewuzi.pbworks.com/f/xanoxol.pdfIn PDF document text
    • http://jetipufagi.pbworks.com/f/papas_sushiria_hd_apk_free_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36089ab3-c946-480f-92a7-71c4d9c95b02/95472684211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c46cdc-8c3b-45f1-b560-df9c2da163a7/how_to_fill_out_a_basic_rental_agreement_or_residential_lease.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/f/40285650244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/545aaaf6-9f96-4e34-8931-a87706d2b001/juwof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee9c764-2a32-41dc-8cd3-2a504151fb26/blackdecker_string_trimmer_6.5-amp_14-inch_gh900.pdfIn PDF document text
    • http://komogabovuwa.pbworks.com/f/gilusejowuvuloxave.pdfIn PDF document text
    • http://sajateves.pbworks.com/w/file/fetch/144467730/million_dollar_habits_stellan_moreira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/371e3d8d-bb23-44c4-bfe4-6ce7cef98bf1/how_to_change_lg_water_filter_lt1000p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb8269e-ada0-4931-8706-d6eb340b1f2b/51019758243.pdfIn PDF document text
    • http://watusuxipidu.pbworks.com/f/top_5_fb_auto_liker_apk_download.pdfIn PDF document text
    • http://dipazuwawex.pbworks.com/f/how_to_set_up_ingenuity_baby_swing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd523ef-f9c0-4afd-ad4a-d58ca8b42973/is_there_a_cheaper_version_of_dyson_airwrap.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/f/sa_salim_2_sil_batan_full_indir.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2E 4060 bytes
SHA-256: 095d2d90f7531c0d289297942d5ff141c5aa326f73ce5a64e2e93fa4482c4735
font_01_sfnt_off00013b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6E 5548 bytes
SHA-256: 4e1a1765bcf8e851ebe9ed653bf7ad0e0d7018a6decb49118aa24643d3f93d72
font_02_sfnt_off00014e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E55 11340 bytes
SHA-256: 6c2e1987920fe74a8306c002071dd2098aa18ed3b4ccd5677ac5fac1c9af3b14

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