Malicious PDF — malware analysis report

Static analysis result for SHA-256 347781ee81415f4c…

MALICIOUS

PDF

62.5 KB Created: 2021-02-20 03:20:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 65aeb1e59eb4aa8e6d42e055b584a33d SHA-1: 0923d10ede1f19ab3148714601640b9f46dee01f SHA-256: 347781ee81415f4c69bb3ffdafe8ca0879e14e7a3a93921995c6c9dd251802e3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and Weebly subdomains, indicating a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via the linked content. The document body itself is largely unreadable, but the presence of URLs and the heuristic firings are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=what+can+i+write+in+my+nephew%2527s+2nd+birthday+card PDF link annotation
    • https://kuboteradaragi.weebly.com/uploads/1/3/1/4/131482952/66445564833af0c.pdfIn PDF document text
    • https://cdn.sqhk.co/bafebolabefo/jjgRhb9/the_maze_runner_cast_age.pdfIn PDF document text
    • http://money-team.site/675981945734iwf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_602d0e6846868.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/ge31jjH/microsoft_flight_simulator_2020_argentina_price.pdfIn PDF document text
    • https://cdn.sqhk.co/pokivozu/geLcFif/craftsman_inn_in_fayetteville_new_york.pdfIn PDF document text
    • https://vedalamiru.weebly.com/uploads/1/3/0/7/130776143/8081610.pdfIn PDF document text
    • https://likunemotiro.weebly.com/uploads/1/3/5/2/135299998/weluwikinile.pdfIn PDF document text
    • https://cdn.sqhk.co/fafaviwi/ijghojd/6249164343.pdfIn PDF document text
    • http://dvestideyli.xyz/the_maze_runner_the_scorch_trials_google_docs3bejb.pdfIn PDF document text
    • http://ek-arenda.ru/38117371144dwmke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://didopip.epizy.com/junqueira_s_basic_histology_14th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/94733407958.pdfIn PDF document text
    • http://mumupaju.epizy.com/sugasibunaxek.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/bedu_pako_baramasa_remix_song.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_off0000b77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB77B 5792 bytes
SHA-256: 668236d862303499764e6e780925041d32a078ee3fcd95d72495620ea67c5033
font_01_sfnt_off0000cb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB25 9652 bytes
SHA-256: bcb108f7a9848cf5816462731d16fa689c73b2320526269fbba46b27c8c1c584

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