Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c11dcdad482f5fc…

MALICIOUS

PDF

80.8 KB Created: 2021-06-13 04:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e11a3a8e8be4415a042cbe7981b92b03 SHA-1: 25ec5bcab40bea9816d35903602608f2bd524273 SHA-256: 4c11dcdad482f5fcb1ad951f3a90e419af2e32a7c6237aa20aaaa4df055fbfbf
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://huntic.ru/pbw?utm_term=filmora+crack+without+watermark+for+pc PDF link annotation
    • https://ritobawen.weebly.com/uploads/1/3/4/4/134486043/vatetomudipafo.pdfIn PDF document text
    • https://mozofejetexutik.weebly.com/uploads/1/3/6/0/136051344/4a1b7d518a7ac.pdfIn PDF document text
    • https://jixinedoxe.weebly.com/uploads/1/3/1/3/131383771/jolup.pdfIn PDF document text
    • https://kisujaxu.weebly.com/uploads/1/3/0/7/130775962/lupog-gitiguxudojido-pazupi-xozenoni.pdfIn PDF document text
    • https://bejolikide.weebly.com/uploads/1/3/1/4/131437094/wopeb.pdfIn PDF document text
    • https://robigatif.weebly.com/uploads/1/3/0/8/130873787/caa7da170.pdfIn PDF document text
    • https://butusokusumowa.weebly.com/uploads/1/3/5/2/135294155/6367797.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/2559725.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/8920ae41-45f9-4df8-9bba-d7318d49c72f/depewolumejes.pdfIn PDF document text
    • http://laxaxufudej.pbworks.com/f/what_is_flemings_left_hand_rule.pdfIn PDF document text
    • http://tefuraviwuw.pbworks.com/f/how_to_duplicate_things_in_minecraft_creative.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/f/74159045215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0840ff0-90f2-43ff-b5da-05af27dc5cbc/94983198379.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/68024950081.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/59932077181.pdfIn PDF document text
    • http://luwivaj.pbworks.com/w/file/fetch/144517653/how_do_you_change_the_governor_on_a_tecumseh_engine.pdfIn PDF document text
    • http://xutosop.pbworks.com/f/tepunusimawezujinoxoline.pdfIn PDF document text
    • http://lufokomarib.pbworks.com/f/alphabet_handwriting_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bcd8721-42be-401c-b087-23737839a57a/lexutabuvodenor.pdfIn PDF document text
    • http://jotuwufo.pbworks.com/f/motorola_apx_7000_charger_manual.pdfIn PDF document text
    • http://gogoporiwo.pbworks.com/f/how_to_use_ehub_for_allied_universal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e6f527c-4aa2-4a1e-9131-8bb341f07299/what_is_the_weather_like_in_washington_dc_year_round.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_off0000fc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9F 5188 bytes
SHA-256: c27d6b6b5b79ae314a3fcbdbcb4acd48ad1e1fe71e9482200443a8764e14fca9
font_01_sfnt_off00010e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E33 11172 bytes
SHA-256: 99759b8c3bc1a693f2abeb49cc0f08b6431b02b1f8a6793a097a19979ab2dcc0

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