Malicious PDF — malware analysis report

Static analysis result for SHA-256 0554505f802b081f…

MALICIOUS

PDF

69.2 KB Created: 2021-03-31 23:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 767d38684757b2f6e0309b0bd2e463ef SHA-1: d7eb9f7954da58dd131b5c24286632b4e517d7d0 SHA-256: 0554505f802b081f4845a05b0fd052e908f489ec9f73e6108b74d5a7a76c6210
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO poisoning attack. It contains a large number of external links, with a primary URL pointing to 'https://xajibur.ru/strik?utm_term=warriors+into+the+wild+audiobook+chapter+1', suggesting a lure to external content. The PDF structure and embedded links indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=warriors+into+the+wild+audiobook+chapter+1 PDF link annotation
    • https://fufudexun.weebly.com/uploads/1/3/5/3/135317209/f222f07a9546a.pdfIn PDF document text
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/aa2de7b.pdfIn PDF document text
    • http://ndfnasg.xyz/short_summary_of_love_is_a_fallacy5qwzt.pdfIn PDF document text
    • http://supportcopyright.net/80925335566gyacn.pdfIn PDF document text
    • https://neruzubegakakew.weebly.com/uploads/1/3/4/0/134017499/simod.pdfIn PDF document text
    • https://fefosixofenovi.weebly.com/uploads/1/3/4/7/134755919/633a9e.pdfIn PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/jakedovakaba_velidunikuvalu.pdfIn PDF document text
    • https://pelunukemuf.weebly.com/uploads/1/3/0/7/130776607/6362106.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/sony_cdp-cx355_parts_listdisnz.pdfIn PDF document text
    • https://birifisak.weebly.com/uploads/1/3/4/4/134493055/mefamixitubike.pdfIn PDF document text
    • https://xelefivaj.weebly.com/uploads/1/3/4/2/134234850/mujujuvu_zunexapovomis.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/a7a006dc72.pdfIn PDF document text
    • https://sinitilelimokiz.weebly.com/uploads/1/3/4/3/134348988/1001227.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/piwanisaj/gdi32._dll_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/fosiluju.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/ralph_waldo_emerson_poems_self_reliance.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/datixuf.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/how_to_load_a_cva_bolt_action_muzzleloader.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/finra_arbitrator_reimbursement_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/dimogozezijazijepaw.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/mosatefexasepitukor.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/22080520476.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_off0000d1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AA 5524 bytes
SHA-256: f7a08dd2f359ee1bde6222fcc6985ad3be39f94e0f3dc303b14ec1f663bc7d51
font_01_sfnt_off0000e481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 10296 bytes
SHA-256: adb03c49a6483bbb8736a6e83d334e3c0196e183c1af866ace8e7d05cec601a7

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