Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada9bad36a4f34ee…

MALICIOUS

PDF

74.8 KB Created: 2021-02-15 04:01:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 00014a4a2442120270bfeeb1b92427e7 SHA-1: dec7b2d60388fb7af27c4ab1b374b406d952a6f3 SHA-256: ada9bad36a4f34ee02a05c28d570fc460e47996e178ad084d7b7cca5480ca100
156 Risk Score

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 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 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.
  • 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/123?utm_term=dirk+the+protector+audio PDF link annotation
    • http://zoomita.fun/human_resources_specialist_interview_questions_and_answersnjw1o.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/98675387443ltjtz.pdfIn PDF document text
    • http://gezinuloxi.22web.org/70097054990.pdfIn PDF document text
    • http://hotita.fun/chevron_corporation_annual_report_201121hm9.pdfIn PDF document text
    • https://fomoxejuj.weebly.com/uploads/1/3/4/0/134000143/xevosozejeki.pdfIn PDF document text
    • http://sportita.fun/53047589098w8q1v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://netefazonop.epizy.com/after_effects_tutorials_motion_graphics_templates_free.pdfIn PDF document text
    • http://nazifaba.rf.gd/78120362274.pdfIn PDF document text
    • http://jupunefubepaza.rf.gd/glacier_national_park_tourist_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/vekesum.pdfIn PDF document text
    • http://zebofazedixa.rf.gd/7924972730.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/cambridge_4_listening_test_2_answers.pdfIn PDF document text
    • http://kodexogezetegir.epizy.com/59587335597.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/bengali_movie_video.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/logiciel_pour_fusionner_mac.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_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 5012 bytes
SHA-256: c02a6a6c7bb3a491d5ac03c48abeab7455129da24adf60fd5cf90ad4b08e0d77
font_01_sfnt_off0000fab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB3 10384 bytes
SHA-256: c0dbce17f6b5df8905ef783dfa277edf9617b5bb1c5da1a20bec7cc9dc2ec505

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