Malicious PDF — malware analysis report

Static analysis result for SHA-256 e785bbd233c8b3af…

MALICIOUS

PDF

69.4 KB Created: 2020-11-10 08:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f0e787cf67b5c45b1c03526d05733606 SHA-1: 5bcdaaeb232860f4ffd5ab0a42d12d0787bdccee SHA-256: e785bbd233c8b3afc62d8e396ca1caec7ad1c6c2b9334cd3d47180a656747ca4
282 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a UPS brand impersonation for credential phishing. The presence of numerous embedded links suggests a link farm or redirection strategy. While no scripts were explicitly extracted, the PDF structure and malicious links point towards a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://revotilam.weebly.com/uploads/1/3/4/7/134732497/b6f47b9cf4e.pdf.
  • 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
  • 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://gettraff.ru/aws?keyword=polaris+snowmobile+repair+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5fa88a16980f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f8721b4cfa13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f99d3f5bb55b.pdfIn PDF document text
    • https://revotilam.weebly.com/uploads/1/3/4/7/134732497/b6f47b9cf4e.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/203b8680-809c-4721-877a-d3c2429037ae/tajefezoxox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61ea75bf-32d4-4c6f-945d-390c790f71ef/jisobisoveta.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/zizajojexu.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/zawasalemagex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4afe92-142c-4a43-bf74-fd07556eb6fe/principles_of_money_banking_and_fina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b855709d-ebf1-4e7c-94f8-a0183325c418/25354070632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f412845d-e80c-41b0-bafa-cb16bb1c3c6f/57719263313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedce249-947a-45e6-b3e7-ceb3ed9e87b1/ngk_bpmr7a_to_champion_spark_plug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f12b86-d8fb-4274-b18b-d38ccf2971a9/5626309128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb07713-bc99-4d92-b030-c7167e5eb69b/lg_led_hdtv_32lj500b_tv_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4727d2-4331-4eac-9253-1118fd52a76c/39824711392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe5352f-8d6f-47db-98c5-1922c774ea5e/botututadonej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB705 5200 bytes
SHA-256: bd836bf3da607f80d0d8519e0ebaab8f7acaa99f07c034d2f91da0e500c65742
font_01_sfnt_off0000c8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A6 12364 bytes
SHA-256: 77336a5dba3fc17a027b2450d4b41fea61788f7e0a95ed4c9d4cef6a0137f171
font_02_sfnt_off0000f10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10F 16132 bytes
SHA-256: 2def80ee9cf871b89fa1821d83521187f92649b88f41053709a5a2c79b3e7c85