Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a72d09bc8c1662…

MALICIOUS

PDF

83.7 KB Created: 2021-03-29 18:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bf053abe0375785b9123bee11290a9b3 SHA-1: 0e7e118370fcccb3eb11f91320baec44171d246f SHA-256: c4a72d09bc8c1662bc82bdabb0ec108c02de2abe3ff8278f403b89783a6a2730
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The document body contains text related to searching for a movie, which is likely a lure to encourage users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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
  • 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://maypoin.ru/strik?utm_term=the+titan%2527s+curse+full+movie PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477651/normal_5ff8e843b5586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476285/normal_602891d98e879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449395/normal_604d293c39788.pdfIn PDF document text
    • http://pojorabe.iblogger.org/aggiornamento_android_huawei_p20_lite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392666/normal_5fe2e799bbef8.pdfIn PDF document text
    • https://mofagobebaz.weebly.com/uploads/1/3/4/6/134633285/792e6a02.pdfIn PDF document text
    • https://zegilaritapedu.weebly.com/uploads/1/3/1/4/131438092/4821394.pdfIn PDF document text
    • http://sell-toclick.online/nebafuwisarebagusa2kafp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478926/normal_6040148597acc.pdfIn PDF document text
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/tuxadafisabuzet.pdfIn PDF document text
    • http://avto-trokot.xyz/comment_installer_wireless-n_wifi_repeater_en_francaisb81ns.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450628/normal_5fef0cb39be33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499622/normal_6026a9ed459c0.pdfIn PDF document text
    • http://123dutch.com/difuxepodornnh95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487208/normal_5fd2d447e3653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419451/normal_603809ebaf371.pdfIn PDF document text
    • https://xidamosu.weebly.com/uploads/1/3/4/7/134707329/luwitakegemidaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417214/normal_5fd081f3a064f.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/vazopekaxiwuxi2yqxo.pdfIn PDF document text
    • http://webmastervlad.ru/tell_me_three_things_age_rating99qba.pdfIn PDF document text
    • https://femesavez.weebly.com/uploads/1/3/1/3/131383434/zedopu_jejefasalavi_nujof_korivixonagitug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472475/normal_5fc574df8c2d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kekabipiji.rf.gd/grading_sheet_template_shs.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 5164 bytes
SHA-256: 1a74726d353da2f23b20ff72473f8752e7ef51a7b4b9cf4c9f4ab0524b8157a0
font_01_sfnt_off000100e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E8 11888 bytes
SHA-256: 161e2932d6d608eb3a2f6e28ddff4a128488717693b2cb8b62daca594f255e3a
font_02_sfnt_off0001294e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294E 16544 bytes
SHA-256: 300c7f117c1b3f28222e6f18d7fe2cb3cc548ae274c367e940a7c69867c9f305