Malicious PDF — malware analysis report

Static analysis result for SHA-256 7343e9982b30f08d…

MALICIOUS

PDF

75.2 KB Created: 2021-03-20 13:22:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 31f3ba5ecd2880435f5c452e263de5d6 SHA-1: 83aa09cdff2f1883027568f374306ed2127394b6 SHA-256: 7343e9982b30f08de0f3231f4dea5214e90fae0cc0c76650040aa9996431a1c6
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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=what+is+the+summary+of+the+poem+fire+and+ice PDF link annotation
    • https://gejodawutu.weebly.com/uploads/1/3/1/1/131164152/3681724.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/hTFgdaX/56917557982.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/8192803.pdfIn PDF document text
    • https://dojoxokixen.weebly.com/uploads/1/3/4/8/134878929/1811866.pdfIn PDF document text
    • http://vabaxowerad.iblogger.org/waruvufeku.pdfIn PDF document text
    • http://nagupenaxija.iblogger.org/alpha_jet_evo_printer_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/dKEL4lt/vobolizujuwesur.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/6r7Bij7/tap_titans_2_artifacts_damage.pdfIn PDF document text
    • https://nakeripa.weebly.com/uploads/1/3/2/8/132814262/ac8a33d.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/3396901.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/OYiQjhF/tezepapewafovunase.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/iglhbhj/3966286990.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/tabobujimo/fevoganoduwa.pdfIn PDF document text
    • http://purokamutene.rf.gd/baja_autoestima_en_mujeres_maltratadas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2eab28-5244-4057-9b51-56c0f9dfab47/prevention_through_design.pdfIn PDF document text
    • http://xupevovegizem.rf.gd/canadian_coast_guard_regulations_for_small_boats.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/rurudavigezizefosexodiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e27973c-44f1-46cc-bb91-6487d41d1623/should_a_season_be_capitalized.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_off0000e904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE904 5480 bytes
SHA-256: 338dc55765b79ec4fbd798409671860d1291aef112bb82498287ada9d7144465
font_01_sfnt_off0000fb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 10628 bytes
SHA-256: 126a212d3c9779c1122792f6ba867297d89a7a43bfdf9eb4dca0e504ca32b48d

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