Malicious PDF — malware analysis report

Static analysis result for SHA-256 de705ee7ddebae23…

MALICIOUS

PDF

77.3 KB Created: 2021-02-28 00:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 441435c22a608aea959cc400a7e02c3c SHA-1: fc544a009da5bc862236cd3a2588a93981b7c430 SHA-256: de705ee7ddebae2384d1061e35404f76658ea867a1b0d5ad3e587a2ae4d5e63c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO abuse tactic. One prominent URL, 'https://pelibifir.ru/award?keyword=the+family+crucible+theories', is likely a lure to a malicious site. The presence of embedded JavaScript, though not fully detailed, indicates potential for client-side exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/award?keyword=the+family+crucible+theories PDF link annotation
    • https://gideturifit.weebly.com/uploads/1/3/4/8/134887905/5670407.pdfIn PDF document text
    • https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/sumotewu-loxawip-lefimipeguler.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/89e0b.pdfIn PDF document text
    • https://dowolozudatu.weebly.com/uploads/1/3/4/0/134000293/wakogusa.pdfIn PDF document text
    • https://rugaxiloved.weebly.com/uploads/1/3/4/3/134305568/ee79de0793f.pdfIn PDF document text
    • https://wevubajapema.weebly.com/uploads/1/3/5/9/135958203/5324638.pdfIn PDF document text
    • https://filukekab.weebly.com/uploads/1/3/4/4/134478490/733771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496597/normal_603922b6504d7.pdfIn PDF document text
    • https://kivifakan.weebly.com/uploads/1/3/4/8/134870172/vafalevu.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/baxekojojexusol/forest_department_exam_model_papers_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/adjective_phrase_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/les_afficheurs_7_segments.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/rascals_movie_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/lojati.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/guided_elk_hunts_in_eastern_oregon.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/history_of_bhatti_caste_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/88919136982.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/lujovedobofeg.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_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 5312 bytes
SHA-256: ff496da84e2135e54d1f0d7b8a0c37520502e2cbcfdd906fbc0262fba94362c8
font_01_sfnt_off00010526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10526 10124 bytes
SHA-256: 29d31f853154202d35e04bfb255f25fdb288aa703fc33fcf598f22be89f70c2a

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