Malicious PDF — malware analysis report

Static analysis result for SHA-256 6627cd2bf8aaa6fe…

MALICIOUS

PDF

86.3 KB Created: 2021-02-26 14:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 17f8297f2f46aef54cbb9cbc5255a6a7 SHA-1: 4baf263cab7a19ffd6e60323a2976304405c81b4 SHA-256: 6627cd2bf8aaa6fecfd57c00895e2701f709e06f3dec5e7b625559275f767eae
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to disposable domains or known malicious redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm suggests an attempt to obscure the ultimate destination or to leverage SEO tactics for malicious purposes.

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
  • 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/strik?utm_term=embraco+compressor+wiring In PDF document text
    • https://cdn.sqhk.co/miwataxanis/jjz4jaT/jujiletaxax.pdfIn PDF document text
    • http://nature-ital.space/75588271636fswuv.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/chaggpr/23445770298.pdfIn PDF document text
    • http://trellos.fun/bbno_lalala_songtj0m4.pdfIn PDF document text
    • https://cdn.sqhk.co/gofuzurafano/ichh3kW/95592130568.pdfIn PDF document text
    • http://instapriz.online/lipegirux0x9e7.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/jhhchbW/qr_scanner_app.pdfIn PDF document text
    • https://sisexalixigana.weebly.com/uploads/1/3/5/3/135323773/5e886.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/ZYiawhe/21487952668.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/4864526.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427104/normal_5feff361bb47b.pdfIn PDF document text
    • https://cdn.sqhk.co/vetejevibas/aBgcCjd/43527825141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5fd31df692176.pdfIn PDF document text
    • https://guxojifupu.weebly.com/uploads/1/3/1/4/131438233/3353923.pdfIn PDF document text
    • https://mepodatadun.weebly.com/uploads/1/3/1/4/131452799/femafemafufav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463034/normal_5ffa3f5fed9c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzapodux.rf.gd/salesforce_lightning_training.pdfIn PDF document text
    • http://rarezutawuwelam.epizy.com/zimoxugeluretisutofawiwu.pdfIn PDF document text
    • http://kubemumibesedu.epizy.com/godubogupogeg.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_off0001149b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149B 5408 bytes
SHA-256: f13429ee50a47bb9c437bdd83b47741f5d560f17f862af9150b12329c4066add
font_01_sfnt_off000126ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FF 10912 bytes
SHA-256: 8a0410099758dcc3bb3fdffed7a4c4f3ca6b5ae6496cca19b593b9ea3fd47a7a

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