Malicious PDF — malware analysis report

Static analysis result for SHA-256 5284951b2c9efb5a…

MALICIOUS

PDF

80.6 KB Created: 2020-11-20 08:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 177116ea96559fa66b0e99a2437ae183 SHA-1: 20c842d5cfd1de276afdaf7d454c9201d13389c9 SHA-256: 5284951b2c9efb5a1e5e314714b12263737fc31b53bc37702e9c49ae1b3e0898
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm and redirects to a known malicious URL, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity, likely involving the exploitation of PDF viewers or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://cctraff.ru/aws?utm_term=dnd+adventure+league+logsheet In PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/munaximeje_tojukaxeduli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423780/normal_5fa4ff24a786a.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/duleladubazukufavexu.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/rizuzevakuwatapedaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_5f93f7f0e5cf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393035/normal_5f98e8271bba5.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/6fa40b6c-d6e4-4e52-82e0-c7b7beabbb03/falamupubutupevazarezaxid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02280b12-7ddf-4ebe-9acf-eb9072723d08/95778333401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b216356b-3620-4c0c-b799-6deb8b1430c2/tabla_z_estadistica_nivel_de_confian.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/43997935661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8cbb525-5570-4714-8f3f-6935d3a487ca/zibakorivupivutuxawem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c18c290-ce06-4a3b-9333-c23b85dbc65a/comment_reparer_une_batterie_de_velo_electrique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d2fdc9a-4db7-4de6-bf1b-6e91d876080d/sijinuwesejevaduzivilu.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 5

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_off0000fe55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 5148 bytes
SHA-256: c7cc6b8378d01c44f79b364597515131c499030ed16f306be08c546a64c039b4
font_01_sfnt_off00010fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDD 11000 bytes
SHA-256: 33bc0f61b67bc132f3fe0dc78c24dad8454b1921eb70a65c6ab77ed1895dcee6

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