Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb35d2d035f3ad0…

MALICIOUS

PDF

127.2 KB Created: 2021-01-12 22:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 89cee0a4b3d72bfa2d4c2955dd48a30a SHA-1: dcb58356d5dd881d57e3f32362a5f489bf9f4e84 SHA-256: 0fb35d2d035f3ad07582402ce4a90dfd26a507327a520c1bb2331e049c8b6e21
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://trafffe.ru/123?utm_term=cuttlefish+kings+of+camouflage+guided+worksheet PDF link annotation
    • https://rijixovo.weebly.com/uploads/1/3/5/3/135339233/pakigabazotifurox.pdfIn PDF document text
    • https://zuvagojajom.weebly.com/uploads/1/3/5/3/135398962/tuvukumubuzixif.pdfIn PDF document text
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/midizujogepafa.pdfIn PDF document text
    • https://zobutetagi.weebly.com/uploads/1/3/4/2/134265803/loxano.pdfIn PDF document text
    • https://site-1175656.mozfiles.com/files/1175656/train_controller_salary_qld.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/2131571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5f9323d9c6bf9.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/galetajimawaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495393/normal_5fdfc1d3cb3e8.pdfIn PDF document text
    • https://site-1168115.mozfiles.com/files/1168115/dopanevezor.pdfIn PDF document text
    • https://site-1179689.mozfiles.com/files/1179689/doworiw.pdfIn PDF document text
    • https://gekibevuzoz.weebly.com/uploads/1/3/4/5/134503907/luzimaziko-pasokapi-pifevokir-mobirivufili.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001abbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1ABBB 29696 bytes
SHA-256: 5ccaa106e242a470b4e14bfc60280db3a008c21952619bce9a5dd65719519a87
font_00_sfnt_off0001703b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1703B 5496 bytes
SHA-256: 117bca2fd0b78c6ee0b7ac80e72d4c020854df5bb17c446ac50e8ce8650c5d27
font_01_sfnt_off000182d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182D3 12128 bytes
SHA-256: cb604e21b32c53a0523db61c7582bc55e48e6ac84ff6a7775f6c3dad583df455
font_03_sfnt_off0001df34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF34 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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