Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e14abfbd126e7f5…

MALICIOUS

PDF

88.4 KB Created: 2021-03-11 15:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4a689396a047037af8d2499d409b7369 SHA-1: b136f6d97bef2ac717f26ae3b9617fa8937f2aed SHA-256: 9e14abfbd126e7f56384281cbcb033e3b3013d89f64f0f81b17cbe10c9f34959
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=best+single+cup+coffee+maker+with+burr+grinder PDF link annotation
    • https://cdn.sqhk.co/vilitemeru/UCHjbia/zidavijavirabokuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374009/normal_6004ecfe8657b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459469/normal_603b345c347f8.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/g5hbjby/76318128794.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/eifgjVG/65203529454.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/igsje4l/tovar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5fe32c57b13b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388165/normal_5fca96686f73f.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/dighdkd/lowivoweza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465249/normal_60069c112ff18.pdfIn PDF document text
    • http://jowitut.iblogger.org/black_chunky_sole_platform_boots.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_08b64d47e84448dcaae8f15b3d130f0d.pdf?index=trueIn PDF document text
    • http://fowevazi.rf.gd/51809443610.pdfIn PDF document text
    • http://jabekufiji.epizy.com/examples_of_adaptive_behavior.pdfIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_bcec88e483a246c5903b83cb2131ae5c.pdf?index=trueIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_7508508cd567440fa6283f0bc3ae2df9.pdf?index=trueIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_d3d00a9428c7435c9931b9555ff7d70e.pdf?index=trueIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_5b29874be0354bd8b688cdad88a323ba.pdf?index=trueIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_4c382cb65c0e4bd6893c5573894d9c8b.pdf?index=trueIn PDF document text
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_5aa82c1e7cb542478efddd20e194edbf.pdf?index=trueIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_9c397195f7c14995b9512dec1d2b832e.pdf?index=trueIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_f515d3b7d9d14dd3a94ca9390bda37f4.pdf?index=trueIn PDF document text
    • https://d7e981a8-8c4a-445e-aef0-60d3d4911bd2.filesusr.com/ugd/65d69c_6a3db75634ad42bc8d71eb7bc4d32b1e.pdf?index=trueIn PDF document text
    • http://xesidif.epizy.com/96834220509.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_54cf140ad6f34d489377272957356564.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_7f2a6bcda8884dab831ba8d4da153847.pdf?index=trueIn 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_off00011941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11941 5916 bytes
SHA-256: 1c8760b2f28ca3fa3b225a4f5ed4dfc5c9b39e5c8999f50fb05687ff7fc29937
font_01_sfnt_off00012d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4B 11136 bytes
SHA-256: bd9d1d23dc4b0e037d27f01f1a08e6155792b091582b1250aecde2cef0802dfc

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