Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf0b8459be267a2…

MALICIOUS

PDF

37.1 KB Created: 2020-04-06 13:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: ae9989753031e990c59ac0346215013f SHA-1: 307018fb17851584eaf67bc4578a6ad4df3b118c SHA-256: 3cf0b8459be267a2ab3b57c115d6256d588b9f54776398d1de6570b92167feec
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file exhibits characteristics of a link farm or SEO spam, with a large number of embedded external links to other PDF files hosted on various domains. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior. The primary intent appears to be directing users to a network of external resources, potentially for malicious redirection or to inflate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://culturalmindfulness.com/uploads/1/3/1/4/131452806/131452806.html#generalized+linear+models+in+r+part+4 PDF link annotation
    • http://guelcreations.com/uploads/1/3/0/5/130543364/6239246.pdfIn PDF document text
    • http://livewellbeactive.com/uploads/1/3/0/5/130544321/xenewejijaxabedeje.pdfIn PDF document text
    • http://hardchromeproducts.com/uploads/1/3/0/4/130476162/b6bbc0397f15.pdfIn PDF document text
    • http://lopezteaches.com/uploads/1/3/0/6/130604324/puxazoke_togemodiwu_dulomo.pdfIn PDF document text
    • http://codypatchell.com/uploads/1/3/0/3/130379610/zujiwowevoditojotipe.pdfIn PDF document text
    • http://katieamandamyers.com/uploads/1/3/0/4/130483198/pimaladefugux_visewerevapodug_pegolavo_lozivo.pdfIn PDF document text
    • http://pondsandmore.net/uploads/1/3/0/2/130272638/laguje.pdfIn PDF document text
    • http://samanthasgoldendoodles.com/uploads/1/3/0/6/130603760/2d0891bb88c2.pdfIn PDF document text
    • http://cleartitlecamry33.com/uploads/1/3/1/3/131383766/gufelifupor_kamoganupig_kebofi.pdfIn PDF document text
    • http://nechampionship.com/uploads/1/3/0/8/130873998/nakidozewunebano.pdfIn PDF document text
    • http://simplicityboutique.online/uploads/1/3/0/7/130739652/wuxexupurifamu-tisekafisibet.pdfIn PDF document text
    • http://tiffanybellah.com/uploads/1/3/0/3/130379169/7318507.pdfIn PDF document text
    • http://fuite-de-piscine.com/uploads/1/3/0/6/130639310/lodariwujajalugisub.pdfIn PDF document text
    • http://cindaradobermans.com/uploads/1/3/0/9/130969858/kizuxowakorepo-faloladikesefo-jusigujoxezonu.pdfIn PDF document text
    • http://googleroads.com/uploads/1/3/0/6/130639360/salimokemesunedexuki.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
🗂 Part of campaign: cordiallyinvited-designs.com 5 samples

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AF 8556 bytes
SHA-256: 65596e7149778e96c75ec7c8ed66c69bfa75ef3e86862c9db061527878ee7bb7

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