Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6815284252ec363…

MALICIOUS

PDF

67.2 KB Created: 2021-04-19 14:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7b4e1ac38935b7e865416e305cf0f6d5 SHA-1: 7cab3ec4175e2965ba2da67f1f10b60eaef38efa SHA-256: b6815284252ec363bcaa34cf39c4ac7f6342e458b3b18662991bf4249bfbe5a5
124 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external links points to an attempt to direct the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8183

Heuristics 4

  • 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 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://midufefew.ru/strik?utm_term=free+osha+training+for+construction PDF link annotation
    • https://cdn.sqhk.co/tokarikadez/WggFjS9/bolts_nuts_inc_chattanooga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501042/normal_5ffd5481a3186.pdfIn PDF document text
    • http://ziwewixowele.sportsontheweb.net/52100664973.pdfIn PDF document text
    • http://sokobumoxagug.scienceontheweb.net/tekebipifolikofiwuje.pdfIn PDF document text
    • http://kvyovk.xyz/excel_worksheet_l_gok3zh.pdfIn PDF document text
    • http://bnl-jobs.com/epson_wp-4530_manualqdhiv.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxiwugo/khgjjjd/wamuripe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421627/normal_5feb523d85e7c.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/Ghfjfjh/the_buttons_band.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_605c6cdf43886.pdfIn PDF document text
    • http://nigodofifulo.scienceontheweb.net/coquetel_palavras_cruzadas.pdfIn PDF document text
    • http://winoraama.space/pomazalatitiva3oxbo.pdfIn PDF document text
    • http://weareanonymous.org/35973398692y3k9v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_603f099367951.pdfIn PDF document text
    • http://bloomwithdeanna.com/accounting_principles_volume_1_weygandtqt11h.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/satulibaren/42971892320.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/30049754993.pdfIn PDF document text
    • http://gafodix.myartsonline.com/how_to_get_free_champions_in_marvel_contest_of_champions.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/63893734404.pdfIn PDF document text
    • http://maguzuj.rf.gd/64458149411.pdfIn PDF document text
    • http://muvizedo.epizy.com/ledemifusulinibanuvonis.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_off0000e60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60D 5064 bytes
SHA-256: 14d985da764753932b58eeb647c4e5cc67dd8ab2c2a69f69837543f6eb0caf9a

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