Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f5005ab4b09575…

MALICIOUS

PDF

76.3 KB Created: 2021-05-28 18:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 49ba0a680f51b3b9ea0f99ffbd188ab6 SHA-1: d080fc950b3c50b0cbece3d8af7664c94f181439 SHA-256: d0f5005ab4b0957549835a3f2b207006ba1e104e81f642db12489759ebcb296c
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 numerous external links to other PDFs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest a tactic to drive traffic to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/wb?keyword=unapproachable%20east%20pdf%20free PDF link annotation
    • https://sotezogurew.weebly.com/uploads/1/3/2/7/132740991/e6809cbb8b46c4.pdfIn PDF document text
    • https://zifuxiwow.weebly.com/uploads/1/3/3/9/133997311/6f4b4547.pdfIn PDF document text
    • https://pobanebutu.weebly.com/uploads/1/3/4/5/134592169/8214526.pdfIn PDF document text
    • https://denesibupu.weebly.com/uploads/1/3/0/7/130774977/1565018.pdfIn PDF document text
    • https://xafarapodekil.weebly.com/uploads/1/3/4/3/134369556/43270cb6.pdfIn PDF document text
    • https://defusisiz.weebly.com/uploads/1/3/4/5/134599350/fubajup.pdfIn PDF document text
    • https://kusawagefeduzuj.weebly.com/uploads/1/3/0/8/130874333/zuvaditalife-jobomoj-kelexono-pipejus.pdfIn PDF document text
    • https://fedubipogumuwu.weebly.com/uploads/1/3/1/3/131379546/zudixapumu-miviv-jefekamepavig.pdfIn PDF document text
    • https://zoladikadaxupaj.weebly.com/uploads/1/3/4/6/134635808/buwipaw_benodibenoj.pdfIn PDF document text
    • https://rerijore.weebly.com/uploads/1/3/1/8/131856643/fimofasisa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500444/normal_6000edc62d248.pdfIn PDF document text
    • https://sijilosak.weebly.com/uploads/1/3/4/4/134476358/8085362.pdfIn PDF document text
    • https://womogidukiwu.weebly.com/uploads/1/3/4/8/134873304/pirotopasusiwap.pdfIn PDF document text
    • https://doxagazezuzizum.weebly.com/uploads/1/3/1/6/131606815/mutepanotetogar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_601079edbdd2a.pdfIn PDF document text
    • https://sidusumidiwef.weebly.com/uploads/1/3/4/3/134366372/mogeki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b3837f-8de2-4340-b954-ee2bc6d51ecf/windows_run_commands_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13adb1e8-a8bc-4083-915c-7f24e242ef02/healing_is_voltage_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3314179d-11a9-460e-b845-18488316ab36/modo_congiuntivo_condizionale_dire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8ad961-8120-4dbb-859f-ee3fe682ebe4/rilolazijagudamubub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a072adc6-7cd2-4152-8501-baded86c9270/83456455857.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD6 5376 bytes
SHA-256: 14a948319e9f0c01cf1043e58904bad4e1603c10d7013338e293da0dc1ec5a33
font_01_sfnt_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 11180 bytes
SHA-256: 9530a8125b918a522a6f7a67b6a5cebc2c21c1bce5b2023a5b3506a999330674