Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bf6263d20baaa2…

MALICIOUS

PDF

78.1 KB Created: 2021-04-17 23:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e5cc0a414d77bfe5f61378e93af305c2 SHA-1: 22a06a9c09d93ef8a19f9b45b9b9bdf3174a3caa SHA-256: 74bf6263d20baaa226758b0239e3461811725fa89c2e7eaa918eb313fb2532cb
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to multiple external websites, one of which is `https://fokemale.ru/strik?utm_term=how+to+turn+off+a+car+alarm+without+remote`. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent, likely to phish or redirect users to malicious content. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/strik?utm_term=how+to+turn+off+a+car+alarm+without+remote PDF link annotation
    • https://cdn.sqhk.co/fopikudapom/i8hcHuf/xebewewis.pdfIn PDF document text
    • https://cdn.sqhk.co/litigoruf/chimTdi/blogger_blog_stats.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/pirojaxexekodijojelipatu.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/fXCjijb/squad_battle_free_mmo_online_fps_battleground.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/shihdgi/queen_greatest_hits_cd_tesco.pdfIn PDF document text
    • https://nipituwosaxow.weebly.com/uploads/1/3/5/3/135312928/77d75ee.pdfIn PDF document text
    • https://vejanozamafiz.weebly.com/uploads/1/3/5/3/135351199/fojovewov.pdfIn PDF document text
    • http://didazema.mypressonline.com/what_does_crescent_moon_and_star_mean_in_islam.pdfIn PDF document text
    • http://resipowepo.getenjoyment.net/aircraft_engine_parts_and_functions.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/gfgcgfG/covid_19_pandemic_essay_500_words.pdfIn PDF document text
    • http://busimaderule.mywebcommunity.org/foscam_fi8910w_reset_password.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/wbLJAgg/71647508606.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/0ihYVMA/play_free_online_horror_room_escape_games.pdfIn PDF document text
    • https://cdn.sqhk.co/bemememu/niejcia/eternal_masters_draft_guide.pdfIn PDF document text
    • https://xavabakonoliwif.weebly.com/uploads/1/3/4/4/134477423/4880496.pdfIn PDF document text
    • https://wijugola.weebly.com/uploads/1/3/2/3/132303023/a39e302a394d35e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d183e0e0-0fd7-45db-a9de-96aa0c3ddb1c/sosanurafepiwomekafelugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4960b65a-1244-4b13-bd32-782f0d873f11/quantum_field_theory_and_the_standard_model_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a1bc88-2517-491d-9443-c2d26a22c97e/how_to_draw_comic_strips_easy.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_off0000f72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72A 4996 bytes
SHA-256: ff5f8bfb1fd41a369128b29685c75a489bab7b94bc6f915a7e16f219a51078f8
font_01_sfnt_off0001080d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080D 10344 bytes
SHA-256: 65bc9c998675601b37218cc4a57aae6c1eebbd271d30768c20484494af74900b

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