Malicious PDF — malware analysis report

Static analysis result for SHA-256 0090ed92bfe6d5fc…

MALICIOUS

PDF

137.1 KB Created: 2021-03-30 02:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 76d6a279e3855adc8c21e8252a69c4e8 SHA-1: ae4a57b10381dfbae0d3b10ac04ea08fe6332b76 SHA-256: 0090ed92bfe6d5fcf35a6f245752b63f7b11926ac3a3f6ff903f854a642e5d0c
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external links, many hosted on disposable domains. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to potentially malicious websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://fokemale.ru/wix?keyword=sonic+all+stars+racing+transformed+apk+obb PDF link annotation
    • https://safapovajedetux.weebly.com/uploads/1/3/4/6/134642125/fobakezexixew.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/pugarezopof.pdfIn PDF document text
    • https://delidago.weebly.com/uploads/1/3/0/9/130969485/1550207.pdfIn PDF document text
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/nisetepiw-vunigi.pdfIn PDF document text
    • http://bitoxifa.sportsontheweb.net/taxitebemiruzewizov.pdfIn PDF document text
    • https://vaferevipesefur.weebly.com/uploads/1/3/0/9/130969420/tatakofekeso.pdfIn PDF document text
    • https://dinadexoliba.weebly.com/uploads/1/3/6/0/136091941/3431221.pdfIn PDF document text
    • https://vupolape.weebly.com/uploads/1/3/4/7/134749420/xujevotepuboribetuf.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/membrane_technology_for_wastewater_treatment.pdfIn PDF document text
    • https://dezuvatag.weebly.com/uploads/1/3/4/6/134667454/6724978.pdfIn PDF document text
    • https://fusodozot.weebly.com/uploads/1/3/4/0/134096428/fagegamesorivirosale.pdfIn PDF document text
    • https://tujulita.weebly.com/uploads/1/3/4/6/134687611/libowoburabubat_virufomeleli_bewofini_vepegoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bivoxubi.epizy.com/futile_devices_piano_sheet_music.pdfIn PDF document text
    • http://nekelaxowe.atwebpages.com/brche_dividieren_bungen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30655a8-1cdd-4983-8880-a78a9b3dd75d/19082919033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c954019a-8954-4d9d-aff8-20f77d988fea/my_samsung_tv_will_not_connect_to_wifi.pdfIn PDF document text
    • http://kazaxese.epizy.com/atualidades_para_o_enem_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1f707c-1b1d-4311-987f-55795fea8c3b/wanuromebelemubunedo.pdfIn PDF document text
    • http://zejekaliv.epizy.com/dog_cafe_business_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/648eebbb-89e0-4dbd-9d69-0a2d7265b038/lightstream_suntrust_auto_loan_overnight_payoff_address.pdfIn PDF document text
    • http://tujatubaniza.epizy.com/16075545104.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A3D 5572 bytes
SHA-256: 493355017aa86153943189766d523fa5342f012c82210ef38cc23810a9bc5467
font_01_sfnt_off0001acf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACF4 8012 bytes
SHA-256: 69a6e5c63816e72d0b41ecb780be3318bd261a75b3feba454efb750eb3020579
font_02_sfnt_off0001c8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8F0 12160 bytes
SHA-256: 794fead6bcfcda978747473112b677ace3de6d8d28cce4acb10bee6c04cdcdbc
font_03_sfnt_off0001f25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F25C 16208 bytes
SHA-256: 23fb053ee487b225b4161442c5fb1c6616ae1957d1a3293f1c91e333b45a9988
font_04_sfnt_off00020797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20797 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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