Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab82e311fbec2cf…

MALICIOUS

PDF

58.2 KB Created: 2021-04-13 23:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6b75bb4be7175eb0568f83f1276cbd15 SHA-1: 5cd982d676221b8e766bab11397e20b6e067ed66 SHA-256: 4ab82e311fbec2cf919c93bbfcf6204994d79ef41009c5d2c12c24d76df6a1f2
184 Risk Score

Malware Insights

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

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 0.9744

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://soxebez.ru/strik?utm_term=tao+te+ching+book+english PDF link annotation
    • https://cdn.sqhk.co/zedozomi/bhdegeM/how_does_easy_pay_circle_k_work.pdfIn PDF document text
    • https://felavutiz.weebly.com/uploads/1/3/1/1/131164211/ab8627d08.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/jHjgiab/bupiropazovu.pdfIn PDF document text
    • http://faguduni.22web.org/24469266464.pdfIn PDF document text
    • https://wutiduxa.weebly.com/uploads/1/3/5/3/135300785/6581062.pdfIn PDF document text
    • https://cdn.sqhk.co/rigepasemapa/gIggXhf/bookman_gothic_font_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/adlhjgs/formula_1_drive_to_survive_trailer_ita.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/cjayuG6/fimuxerefozorobezuwikuk.pdfIn PDF document text
    • http://metagopu.22web.org/anlise_swot_artigo.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/jfoTrgh/movonodipisiju.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/X5CHTib/wurozavevabamenujux.pdfIn PDF document text
    • https://cdn.sqhk.co/fidumugovoz/j3mJcha/nintendo_switch_online_deals.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxazazul/ZoyWeAZ/billie_eilish_merchandise_uk.pdfIn PDF document text
    • https://wuxigato.weebly.com/uploads/1/3/2/6/132680835/7553673.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lemuguta.rf.gd/minn_kota_riptide_ulterra_80_60.pdfIn PDF document text
    • http://magakawigola.epizy.com/98502856088.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/30017761685.pdfIn PDF document text
    • http://vimomata.rf.gd/wanowiropisanivapuvalago.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/bekapewukojejisuloweriti.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C5 5120 bytes
SHA-256: 0b767549d0dd06a04126fb0169bf3b9dac745c596abdffd15bc564ab51142774

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