Malicious PDF — malware analysis report

Static analysis result for SHA-256 de87a1d3dafba7be…

MALICIOUS

PDF

92.6 KB Created: 2021-03-07 23:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e65ae1b3d4541f91c556dd4e4de6f68c SHA-1: 803a1e479a27cfbd4335cbf560b29a2175b048e8 SHA-256: de87a1d3dafba7bede592e9390ca0ca591dfcb12e9178e1fcffeadb7f4bfbadd
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure point towards an attempt to manipulate search engine results or distribute malware via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9753

Heuristics 5

  • 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
  • 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://jacksth.ru/aws?utm_term=immanuel+kant+books+online PDF link annotation
    • https://ritibamubube.weebly.com/uploads/1/3/1/4/131437410/8933581.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/0ILiiag/91468672429.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/tokupetupebek.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/jhhcgjg/musicians_friend_coupon_code_april_2020.pdfIn PDF document text
    • https://kukibujez.weebly.com/uploads/1/3/1/6/131637652/213562611f8ca55.pdfIn PDF document text
    • https://tetunabirudav.weebly.com/uploads/1/3/0/8/130874278/baxaxekagup.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/40d00de6-763a-43f3-9c36-cac809c57d9c/45770568071.pdfIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_30b2675aee414facaab4d053bc18820d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/51cbcfd4-7ca5-4c73-91eb-8eccb3665495/pippin_revival_score.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f45bcd78-3639-46d5-9935-401dc8eb1cde/newoxalozufiwuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/369ba858-3f04-490c-8465-457672554d0f/2297258875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/084d6abc-7ea1-4f3a-958b-b5f89d5cd360/96618644477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4be4ca9-e8d8-4f45-bdfa-00761082001f/i_am_a_man_lyrics_o_brother_where_art_thou.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e81bf0f-b1af-4603-8ea6-367171111766/comcast_remote_codes_for_cable_box.pdfIn PDF document text
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_f55cc996e3a749048e2c73ada1a485ff.pdf?index=trueIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_65860cadb2a0415abed9529c0ab235a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b80fb8f-7523-4287-8c39-ce2acc288dcb/pharmacy_sig_codes_cheat_sheet.pdfIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_c27eb41a7fa24eb3a5aae665c85628c5.pdf?index=trueIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_4192b9a2f5064ad3afab446df86649d9.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000161d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161D7 4756 bytes
SHA-256: 9abb233098931f4fa02d484dc7430976f64f7a4b85f40f3429523bdde5dbd053

Open this report in the interactive analyzer, or submit your own file for analysis.