Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89712041b608fd1…

MALICIOUS

PDF

58.3 KB Created: 2021-03-07 15:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d90ea33f2721aa2af53b36d43efb858 SHA-1: bdb05eed277ce2b2a425a0060225dd035f3b1197 SHA-256: e89712041b608fd170e93e4404672249a35ce4eb10e33a97de631b0f22ecd1f6
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than being a legitimate document. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9560

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://jumiwimov.ru/strik?utm_term=how+to+update+i+pilot+link+remote
    • https://static.s123-cdn-static.com/uploads/4448548/normal_600111f8b3b83.pdf
    • http://naxovonukile.iblogger.org/aztec_symbol_for_13.pdf
    • https://static.s123-cdn-static.com/uploads/4443292/normal_5fff705d31ce6.pdf
    • https://cdn-cms.f-static.net/uploads/4392869/normal_6027347a1976c.pdf
    • https://cdn-cms.f-static.net/uploads/4453338/normal_5fd7cda0ec3f0.pdf
    • http://difavusimope.iblogger.org/21763380725.pdf
    • https://cdn-cms.f-static.net/uploads/4450625/normal_5fd15d79ac85a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://82e2731d-caa1-483e-98f9-8716417fe63a.filesusr.com/ugd/5ecadc_da0aa3780f7e4b4d86b7fad337296b71.pdf?index=true
    • http://dudulexo.epizy.com/digotajexulatif.pdf
    • http://votasaze.rf.gd/samsung_vrt_washing_machine_error_codes.pdf
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_219284a9244b45ba99b6f78087ce1891.pdf?index=true
    • http://fotobonifugore.epizy.com/kazedajizavufilefenapemov.pdf
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_05374f0312bc4c87a4d77799b5707fcd.pdf?index=true
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_5a952510251948cc9b5a8242ebafb4f1.pdf?index=true
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_de1ae7359cad43fca094258c84419731.pdf?index=true
    • http://daporev.epizy.com/dolunafezixo.pdf
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_21ea2e24c4a6459685d0cb9d23e5916c.pdf?index=true
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_e8684c7569664104933d6661f4911615.pdf?index=true
    • http://piduvazudofem.epizy.com/79286143988.pdf
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_0cea534262be47929bca25dd6af36d53.pdf?index=true
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_ffae6af23f594e4ab6a7aa3dafacc616.pdf?index=true
    • http://gumofiwulova.epizy.com/hp_laserjet_p2055dn_toner_change.pdf
    • http://wedowif.rf.gd/ccna_for_dummies.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da03.bin
c9d6471def8f0f6bbfcb5a8c14000e1456a246786ddd3959e32ba6ca1b2ff680		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA03 5044 bytes

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