Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bcc67ad5012e73f…

MALICIOUS

PDF

66.6 KB Created: 2021-03-16 05:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81d82fae2ef9b93e09b56e7cf447eef1 SHA-1: 8f375a4a36f511693ec9b95bfc7075bacdc516c5 SHA-256: 1bcc67ad5012e73fd71a78144927760e5d07510dc3aa5de452992050d8cdbe06
184 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-10044375-0', and ML classifiers also flagged it as malicious. The document body, though heavily corrupted, contains text related to 'grounded theory method' and the wkhtmltopdf application, indicating a potential lure to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5377

Heuristics 5

  • 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.
  • 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 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://crophysi.ru/aws?utm_term=what+is+a+grounded+theory+method
    • https://lujotasapamuxa.weebly.com/uploads/1/3/0/9/130969194/tuveges_xijamewowa.pdf
    • https://cdn-cms.f-static.net/uploads/4366029/normal_60171c3503459.pdf
    • http://losinglotterynumbers.com/zumidobobiribanabavata7xxl5.pdf
    • http://vikubemaba.22web.org/sewexaw.pdf
    • http://gopubewigofopa.iblogger.org/nikon_prostaff_3-9x40_.22lr_rimfire_rifle_scope.pdf
    • http://trylait.club/529064118381j62g.pdf
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/xazolamulagawux-luzuwavugaf-nozoj-zafakaxir.pdf
    • http://rankingcoach-seo.com/85666838941v0xsk.pdf
    • https://cdn-cms.f-static.net/uploads/4450889/normal_604dcbded63c5.pdf
    • https://barurusijibipek.weebly.com/uploads/1/3/0/7/130740419/gipumepidif-zorugewafatozo-nodefopafelonox-kamulo.pdf
    • http://effektzhizni.ru/tabela_de_cidos_e_bases_fortes_e_fracosjct8x.pdf
    • http://puzivulagu.iblogger.org/pasuxebefunaroro.pdf
    • https://cdn-cms.f-static.net/uploads/4476418/normal_6025ed858f1e5.pdf
    • https://cdn-cms.f-static.net/uploads/4371524/normal_603e68f698e7e.pdf
    • https://nifubadipapa.weebly.com/uploads/1/3/4/3/134388301/093f54f742.pdf
    • https://gavevuroboba.weebly.com/uploads/1/3/5/9/135959422/99664e8231527e.pdf
    • http://pagupim.epizy.com/newsletter_templates_html_code.pdf
    • http://fafebexa.epizy.com/dls_18_all_team_logo.pdf
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_c06b0cb7472f4faf9a0c7dc515d54bfe.pdf?index=true
    • https://d73c234d-0e3d-497d-8108-d5659bace061.filesusr.com/ugd/58a813_fe592e9342b6436abdd5043b1bb8585e.pdf?index=true
    • https://1ba6f066-89d4-4445-b8a9-08a6de046ef2.filesusr.com/ugd/d40554_7a3416e117fc433dac356ecf0d05642f.pdf?index=true
    • http://nokefibazapowem.rf.gd/how_to_connect_epson_printer_l3110_to_wifi.pdf
    • http://mopikavibitujer.epizy.com/briggs_and_stratton_repair_manual_download_free.pdf
    • http://widopux.epizy.com/pepel.pdf

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