Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e34b0f2abf3765…

MALICIOUS

PDF

73.5 KB Created: 2021-04-25 21:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 192e747f8ea781884fb2c4f5f97a571b SHA-1: dd23b345d3a88835e5ad8fcd65561207f6f0e1a9 SHA-256: a1e34b0f2abf3765af16cf0762247592c86a32938963e81c7e63d3b307b40c42
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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=joel+skousen+strategic+relocation+4th+edition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443824/normal_604f022fab390.pdfIn PDF document text
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/mupoved.pdfIn PDF document text
    • http://mafewagidimu.22web.org/40766825667.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/lxiihhq/38239780000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5fd90cec17c45.pdfIn PDF document text
    • https://gisidamuxifa.weebly.com/uploads/1/3/0/7/130775495/lovexakonunogun.pdfIn PDF document text
    • https://cdn.sqhk.co/woguwubege/hcFjb7x/local_anesthesia_in_pediatric_dentistry.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/Ajdtrjj/rixasawetetonubu.pdfIn PDF document text
    • https://cdn.sqhk.co/zokasejiz/OHYRgiJ/73571235710.pdfIn PDF document text
    • https://cdn.sqhk.co/guwezasov/idihSDc/builders_company_profile_format.pdfIn PDF document text
    • https://wovorixikamaso.weebly.com/uploads/1/3/1/3/131378932/kujewabe-jibalifofaj-rimitepanikok-lituzipijuvewa.pdfIn PDF document text
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/risukolixomu_vimejeviwu_paliso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457302/normal_5fdff33e639c8.pdfIn PDF document text
    • http://dowelatevitik.22web.org/46908599708.pdfIn PDF document text
    • https://gudabujazoz.weebly.com/uploads/1/3/0/7/130739385/mixoren.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ravesezubepad.epizy.com/inorganic_chemistry_notes_jee.pdfIn PDF document text
    • http://bisiziwaros.epizy.com/beastmen_codex.pdfIn PDF document text
    • http://botusomiwa.epizy.com/68411487380.pdfIn PDF document text
    • http://fodabobaxuti.epizy.com/2003_ford_windstar_transmission_fluid_change.pdfIn PDF document text
    • http://tokupan.rf.gd/88657501060.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 8

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_off0000e1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B0 5344 bytes
SHA-256: 1ce8bd711728d4163ace057a76c45755a1f01b78679e319b75ff44a6a87e4fa1
font_01_sfnt_off0000f3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D6 11056 bytes
SHA-256: 1e7b1d4b26f7c5b13e048f68043b36175654c0c4034363a608fd34b8e334bc0a

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