Malicious PDF — malware analysis report

Static analysis result for SHA-256 57cab32f36987032…

MALICIOUS

PDF

77.1 KB Created: 2021-02-19 19:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ba5f67e24e2fcd51a3b3ace332b08ae1 SHA-1: 3e200dd62474b3d539ed1b69078de35cf2128ad5 SHA-256: 57cab32f36987032d055a64d8238bb226e7f2d782d506fed4644a075161a89f7
186 Risk Score

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
  • 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://seumenha.ru/123?utm_term=how+much+electricity+does+a+55+inch+tv+use PDF link annotation
    • https://toxujubew.weebly.com/uploads/1/3/1/4/131437446/e948e4fd6da707b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502817/normal_602b577d28461.pdfIn PDF document text
    • https://cdn.sqhk.co/wozepefiga/afihv12/45518155275.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/hVib1ic/bufagijerigixelumevorenul.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/MFgi1bE/31307655557.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422372/normal_5feba01b2e7b4.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/Jghxwjj/71736711829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_5fe74cd9144d5.pdfIn PDF document text
    • http://coolstudent.space/comparative_income_statement_formatdu79x.pdfIn PDF document text
    • https://lenexemumuvag.weebly.com/uploads/1/3/1/4/131438583/1905031.pdfIn PDF document text
    • https://fuvejewitopi.weebly.com/uploads/1/3/1/0/131070508/kefutapebaz.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/d2yogjZ/talking_tom_cat_toy_flipkart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nokiva/gavulupurewexeviwirup.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/what_are_the_best_data_analytics_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/forestry_minecraft_guide.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_off0000ee6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6C 5520 bytes
SHA-256: 0655293e5e9d89647a8a83402aca54753b1aaedc32525595043d76f0646da40b
font_01_sfnt_off00010122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10122 11288 bytes
SHA-256: ad81cff1b9a8478ff1d70c0160c9880c25bce1fa4c785606c9d25808a1a20ab6