Malicious PDF — malware analysis report

Static analysis result for SHA-256 090f96cab085f446…

MALICIOUS

PDF

72.6 KB Created: 2021-01-27 23:33:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a510f59ddee80d1ba603408148379905 SHA-1: 407873f88b557673f2cd2cf7cd5d24a358fe18a0 SHA-256: 090f96cab085f446a3c678f40b518b2f04bd0b2c43afc9960462f69614cb676b
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure and disposable hosting. The primary link directs users to 'yafferge.ru', which is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to be related to a 'dog poop removal business', likely a lure to entice clicks on the malicious links. The presence of numerous external links suggests a link farm designed to drive traffic to potentially malicious sites, possibly for phishing or malware distribution.

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
  • 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.
  • 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.
  • 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://yafferge.ru/123?utm_term=dog+poop+removal+business In PDF document text
    • https://cdn.sqhk.co/xogudililavo/ddDheRi/masuduniwofiwarotusizut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380384/normal_6007ef9a4d645.pdfIn PDF document text
    • https://zatiwakap.weebly.com/uploads/1/3/1/8/131871625/fomelifujan.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/Sgjjjgf/luravaxisilo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379841/normal_600943f6a90fa.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/oMvubie/75296353249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479705/normal_5fdc040c44637.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/41e534c.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/oO1Nqja/nails_for_you_hours.pdfIn PDF document text
    • https://fitulepam.weebly.com/uploads/1/3/0/8/130874207/6dbb69.pdfIn PDF document text
    • https://xonajababivoxo.weebly.com/uploads/1/3/4/0/134040492/48b1f6c2a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367278/normal_6001ba8e16d0a.pdfIn PDF document text
    • https://cdn.sqhk.co/bozawenibiwa/ezijb5u/bezafositupubon.pdfIn PDF document text
    • https://nalodewemutut.weebly.com/uploads/1/3/1/1/131164475/duduxegasov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485446/normal_5fd6e36be85a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450034/normal_5ff0e1f4e92b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 5336 bytes
SHA-256: c0ff3f08d1a7cda6fd5da473689dc2a16551ca68a008e4cc027d5227abb5e2b9
font_01_sfnt_off0000f12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12F 10792 bytes
SHA-256: 1708501f386f151034ba70d470eaab901a653a933b7679353cd4f84fad00e712

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