Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dceb7ca36646773…

MALICIOUS

PDF

90.3 KB Created: 2021-02-08 16:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 64b4471fa276049f1d5efb7eeb2e8af4 SHA-1: 8ad625e4a6121a85f9f3545f6649b2d8bf9d9a15 SHA-256: 8dceb7ca366467730a781ad148127a08997f24cd990b61d08487fd5884dda80c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the PDF structure indicate an attempt to direct users to potentially malicious content, likely for phishing or malware distribution.

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
  • 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://jacksth.ru/aws?utm_term=crash+bandicoot+2+ps3 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457563/normal_5ff8d9cc0e331.pdfIn PDF document text
    • https://kofudavobew.weebly.com/uploads/1/3/4/6/134602163/d630d4c9.pdfIn PDF document text
    • https://lipodemofuxe.weebly.com/uploads/1/3/5/3/135316225/wejusepo_vopimafibebax_fowalogaweb_sukiwufiwugiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416921/normal_5fdf977e6be19.pdfIn PDF document text
    • https://pomugulawes.weebly.com/uploads/1/3/0/8/130814995/talop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417207/normal_5ffab03b3a5cc.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/jizevusetolofubojudof2gln.pdfIn PDF document text
    • http://trokot-shopnew.online/tilobivewulenafupewzoiu.pdfIn PDF document text
    • http://slimitalia.space/download_movie_codes08lw7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5fd2a0f605503.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456119/normal_5fe2db8a2b06a.pdfIn PDF document text
    • http://smotrikino.fun/kinetic_molecular_theory_of_gases_worksheet2gujs.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/bejeseja/93997417533.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/net_exam_result_2018_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/fegatoximexibiteguj.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/786133295.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/best_astro_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/bhagavad_gita_yogananda_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/ekko_guide_op._gg.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/attu_movie_video_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/70709742857.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_off00012378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12378 5468 bytes
SHA-256: a885c765f1851afe971e4eba1baf37be45055183adbfca29de388f856edea525
font_01_sfnt_off000135fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FC 11096 bytes
SHA-256: bdf8ad3fc1d30121f26543cec8e2c2aaf0b7354a7165ec5b26b83885bdeacbb7

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