Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f92613a3c657ce3…

MALICIOUS

PDF

77.7 KB Created: 2021-02-21 06:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7235d6566a5def2f70a9943afd58de1c SHA-1: 9fabd868ee876fb10dc903adcebce7b7d625a405 SHA-256: 0f92613a3c657ce386e97859f5fe1a910c7bb781f4188325ca9a52e6df6e6859
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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
  • 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/wix?keyword=malwarebytes+android+apkpure PDF link annotation
    • http://mazanatur.space/fetuxetebugivigizgfvdy.pdfIn PDF document text
    • https://talokawibameze.weebly.com/uploads/1/3/4/0/134000376/302b2b242a2de2.pdfIn PDF document text
    • http://vabodulesofife.22web.org/govufu.pdfIn PDF document text
    • https://nipoxumafoji.weebly.com/uploads/1/3/4/7/134717148/waburerupos.pdfIn PDF document text
    • https://kukibutojiw.weebly.com/uploads/1/3/0/7/130775835/35b59.pdfIn PDF document text
    • https://napuximijagebi.weebly.com/uploads/1/3/4/7/134766840/f33fec0076caee.pdfIn PDF document text
    • http://thefortykuti.com/volumuwadenidoxoch4i4.pdfIn PDF document text
    • https://kitejunozog.weebly.com/uploads/1/3/4/3/134319277/mavatiwerumumu.pdfIn PDF document text
    • http://goldstein.capital/53803833091n97jv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixawoxikoni.epizy.com/british_council_grammar_worksheet.pdfIn PDF document text
    • http://pabixezo.rf.gd/66426718860.pdfIn PDF document text
    • http://sibedegaxuwo.rf.gd/ropubegovawej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF49 2856 bytes
SHA-256: 8a9384bc512513f01e7bbd7e26df3f33c10457497f1237922838d3b841070303
font_01_sfnt_off0000e972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE972 5356 bytes
SHA-256: 84b4804f9160a0a9affbe4af66641bb05c1ecc0d577629beb931f9aa42b61851
font_02_sfnt_off0000fbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 14728 bytes
SHA-256: e3d256f107f88b1a86b77500f6acba70a4ac7a1cb22cb5adba02e4eff4ca611c

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