Malicious PDF — malware analysis report

Static analysis result for SHA-256 91aa5c08e1486a93…

MALICIOUS

PDF

75.3 KB Created: 2021-04-07 11:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d0de6243537d30dfac500318089db9e8 SHA-1: 0c96c2334e8622aa3ebf286e32dac6238c1cf9a6 SHA-256: 91aa5c08e1486a930d24ffd50f5efd38392dec78b3849bb450fa3866adb275d1
194 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The presence of a 'download button' lure and a URL related to 'sony vegas pro 16 crack free' indicates a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/123?utm_term=sony+vegas+pro+16+crack+free PDF link annotation
    • https://nulebuset.weebly.com/uploads/1/3/1/4/131411431/1e4fe76.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/Sibifhc/moy_6_the_virtual_pet_game.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/hijTijL/asia_empire_2027_mod_apk_money.pdfIn PDF document text
    • https://tiwofimobodes.weebly.com/uploads/1/3/4/0/134040820/ledegerofaxalubud.pdfIn PDF document text
    • http://jezojarugeboz.22web.org/gimovonotekafugamelode.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/thbhjhj/smart_manager_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/objgjjt/siberian_cat_adoption_chicago.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/hhZhfIv/ruxipowuzunepudep.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/bibieIZ/time_traveler_silver_dollar_city_off_ride.pdfIn PDF document text
    • http://nadakudege.iblogger.org/68195693533.pdfIn PDF document text
    • http://xotujezal.mypressonline.com/kebodapavegazitexilotulu.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/haEhgid/static_class_java_android.pdfIn PDF document text
    • http://dixurujisefumet.22web.org/dominebezova.pdfIn PDF document text
    • https://cdn.sqhk.co/ruselaguzoda/glRjbxz/zakefuneduri.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/bjfgdFc/carmageddon_2_soundtrack.pdfIn PDF document text
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/e5900b3bbb31021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogosugo.onlinewebshop.net/logitech_k120_keyboard_type.pdfIn PDF document text
    • http://pawubiba.epizy.com/32177513252.pdfIn PDF document text
    • http://wubulinefoz.rf.gd/64733659214.pdfIn PDF document text
    • http://muvusibose.rf.gd/xonajufipegijoribikomaku.pdfIn PDF document text
    • http://kigokigaruv.myartsonline.com/32573949437.pdfIn PDF document text
    • http://zukepeva.rf.gd/44277929347.pdfIn PDF document text
    • http://widusop.atwebpages.com/41488869522.pdfIn PDF document text
    • http://toxogus.rf.gd/brothers_karamazov_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FA 5688 bytes
SHA-256: 0f7a24439403cee61ce9e2443bd3b3bff39c12c243b859e666051ed373d08e9c
font_01_sfnt_off0000f989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 11296 bytes
SHA-256: 99ca7b07003beefd3449ee4c458c4e9d98789e1dbe33b06046d64ed16e25adc6