Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1806c22d042e5d…

MALICIOUS

PDF

77.1 KB Created: 2021-01-03 17:10:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d0ff61dd01a6650a35c436047d048211 SHA-1: 0f695ddd86f0fbf6df65053b2c29f259a4d173a2 SHA-256: 1c1806c22d042e5d481093ff85c1c481759a54daea7dc5eaa1532f9558872e96
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://traffking.ru/123?utm_term=sno+tek+20+manual PDF link annotation
    • https://cdn.sqhk.co/busanurutar/QkNggUr/mitabutajaxu.pdfIn PDF document text
    • https://keromarire.weebly.com/uploads/1/3/0/8/130873863/towumu_degawut_lifigozalu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384459/normal_5fa43f4764503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414164/normal_5fd3c0ac10a04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_5fb833ed928fb.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/m1uhbgg/artillerists_mod_apk_1._1._12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416490/normal_5fc6a0b841e74.pdfIn PDF document text
    • https://juvivufoli.weebly.com/uploads/1/3/5/3/135325295/sesiforede_fuxixob_rujojaxorim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5f8fac235a4f9.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/2ihGicC/wovuruvab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476302/normal_5fcacb2898edc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421639/normal_5fa9e60b507d1.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/1ee4bd47-9a61-4390-a6e4-d2e85e18a9ae/cute_booty_lounge_store_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91caa3e-e9d5-4e52-97ae-f249850225b1/statistics_formula_sheet_class_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0374aca0-4db2-4aeb-8d98-1a07b4566d84/to_kill_a_mockingbird_web_quest.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF6 5000 bytes
SHA-256: 025d4272d2ee2965a34ae8a9c025b641a3fd8a4865f666e740355683d582cc4b
font_01_sfnt_off0000ffe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE7 11640 bytes
SHA-256: 35a9017a6fa95bca9b5e2e2f14380cfe24e801986cfbce4ea532982b3295a3cd

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