Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a9e70245f9d771…

MALICIOUS

PDF

61.9 KB Created: 2020-12-15 13:38:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9fc17e99572df35e85f8adbd44980088 SHA-1: 1f8480f371cbb3d9a2d532bad14f32a755a1bb34 SHA-256: d4a9e70245f9d77167a739fb795361452f00d812337c02908127f92174d1d6c4
214 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple critical heuristics as a malicious redirector and link farm. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=petta+audio+songs++mp4+telugu In PDF document text
    • https://nefosedinipal.weebly.com/uploads/1/3/4/6/134698739/muruwefakixedek.pdfIn PDF document text
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/gozegurufinabob.pdfIn PDF document text
    • https://dinurafilaxu.weebly.com/uploads/1/3/4/6/134621410/65671.pdfIn PDF document text
    • https://bexizesuxeneze.weebly.com/uploads/1/3/4/6/134634073/8257666.pdfIn PDF document text
    • https://wisejagu.weebly.com/uploads/1/3/4/8/134881465/zuxowubep.pdfIn PDF document text
    • https://mesirurot.weebly.com/uploads/1/3/4/7/134706751/9011587.pdfIn PDF document text
    • https://korebamo.weebly.com/uploads/1/3/0/7/130739662/sulevoda-dazuw-kavinitupoduf-nugonokoz.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/lekalazuzewuva_logipitupixuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbffe61bf71053ccb0b2b06/t/5fd0d95c48ae4d12180c5d55/1607522653110/sefepuwolovorutirajo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3051916f6d44b07cc8110/t/5fce2ca52bc7884852def07a/1607347365518/48094727124.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc69a0ee2fce462bcb385cb/t/5fcc3d597ae85b53b284b9d6/1607220569901/canon_i_runner_2530i.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/the_big_circle_puzzle_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55ba5239b0722914ef72f/t/5fc98c8a822fbd3263d69fcd/1607044235893/civil_war_battle_of_antietam_winner.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/force_browser_to_js_file.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/decimal_to_fraction_practice_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/ethiopian_reporter_amharic_version.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_off0000b49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB49F 5272 bytes
SHA-256: 13c6d332fcd0fe52b497b64e1be738be094fd4b4ab1ff88a52dee69f56394c4d
font_01_sfnt_off0000c688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC688 10580 bytes
SHA-256: 1dd2baf7dac38af1922e6bf499a4a50da74ff0d890adc7f59fbcf0b7c28f558d

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