Malicious PDF — malware analysis report

Static analysis result for SHA-256 11fa54b160827d94…

MALICIOUS

PDF

66.4 KB Created: 2021-06-10 17:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 55dcce3d66c72106e442d13dd69513bb SHA-1: 68d069830dc607ea042bfe411b869d884da909ed SHA-256: 11fa54b160827d94c2e0d2f8e94f3f808c40228414af7fe97e1dac62fe881299
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, including one to 'soxebez.ru', suggesting a phishing or SEO manipulation attempt. The document's structure and embedded links indicate it's designed to redirect users to potentially harmful websites, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/123?utm_term=indefinite+pronouns+worksheet+pdf+6th+grade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454302/normal_602e49be6e46e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487625/normal_5fd112ed6749a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475380/normal_60686b293c763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_5fdc48f8d9e1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_60558ec2b14c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409246/normal_602afdab7030b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469827/normal_60586777c7c6e.pdfIn PDF document text
    • https://ruzamoga.weebly.com/uploads/1/3/4/7/134761687/c7d3a.pdfIn PDF document text
    • https://lotefexikig.weebly.com/uploads/1/3/4/0/134097130/5287b42f69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366627/normal_5ffc8e972a2b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_60511326351c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385634/normal_5fc979dc8cfd8.pdfIn PDF document text
    • https://vegekonewipure.weebly.com/uploads/1/3/5/9/135964828/3285982.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144412662/54241097393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0db96c7-0fce-4adf-8d2e-a7fb7f72e971/21129210806.pdfIn PDF document text
    • http://nugewil.pbworks.com/w/file/fetch/144649524/ejemplos_de_suma_o_diferencia_de_cubos_perfectos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecfd3709-33b9-4dca-909a-302881d35d46/how_to_draw_easy_things_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2b97f68-8966-4cd2-b5b9-b756ee2ba109/tagalog_movies_free_online_streaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12d53bf-140a-4301-83fe-9210005dc96e/mabigobotafanofuz.pdfIn PDF document text
    • http://wuwolufit.pbworks.com/f/moboduvud.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_off0000c82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82A 5516 bytes
SHA-256: 2cbbd1d3bad78c8231a3ce38dc6ff18e72e92463800564c43ca81329df4dc0e9
font_01_sfnt_off0000daff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFF 9664 bytes
SHA-256: e414c92c2c4d371e992c8f7a96f0b762caee9531a67910ee40082a04cb537d5f