Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c7edcb38c8fb4f9…

MALICIOUS

PDF

77.4 KB Created: 2021-02-24 17:23:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ca1cedec7a116d8bb91bfc8f64fb2c33 SHA-1: 5f4b2703f30e5581e42ae383550f73b2fa4c409d SHA-256: 4c7edcb38c8fb4f90b0644df33abe31f07be30b33cc70414af58c4191627e91b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a 'PDF link farm', suggesting a phishing or scam attempt to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://maypoin.ru/aws?utm_term=lean+six+sigma+certification+cost+in+hyderabad PDF link annotation
    • http://sodahub.pro/sumisedane7sk5w.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/gibiiij/lose_weight_in_30_days_app_results.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/hfAhbqg/tennessee_titans_covid_update_today.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/hbjeiiN/53966537922.pdfIn PDF document text
    • https://paxowamowutujaf.weebly.com/uploads/1/3/4/3/134322095/3a72a40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456705/normal_6034ec98bb6a6.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/gju97HE/mepivib.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/Ogchijj/farming_jobs_colorado.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/Q06jhaj/wordbrain_2_occupations_level_3.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/gqgjj81/como_es_el_pase_elite_de_noviembre_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/konanetufuda/eiDjf3X/lezimumiwovogo.pdfIn PDF document text
    • https://boduburul.weebly.com/uploads/1/3/4/6/134654649/2952981.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/vhc2Wic/my_singing_monsters_pc_big_fish.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/idibgiE/twisted_wonderland_lilia.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE060 5444 bytes
SHA-256: 011fcaa01f398e68bf7533f1a6c47c40fdaf7978779bf9aa55959c956f3dfe44
font_01_sfnt_off0000f2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 11512 bytes
SHA-256: 68852c79cf5fa4bd09b586d49ac1094970fdbac4adfccf096b8e9a4bbff27469
font_02_sfnt_off000119f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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