Malicious PDF — malware analysis report

Static analysis result for SHA-256 976f8eb0eceff8f7…

MALICIOUS

PDF

77.0 KB Created: 2021-03-21 06:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 08f45cdab6ca9bbf3e1c1a7b0d85e796 SHA-1: 05c9d8168f93437d5ca77d8b7b138913213525d0 SHA-256: 976f8eb0eceff8f7995f3063d981cf72e8ba8957748d17a9b06315ed92934a28
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs, many pointing to disposable hosting, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The presence of embedded URLs and the PDF structure itself indicate a deliberate effort to host and distribute links, likely for phishing or SEO spam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://resalured.ru/wix?keyword=the+talented+mr+ripley+pdf+download PDF link annotation
    • https://katifakemu.weebly.com/uploads/1/3/1/3/131381151/dde3eb.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/aggticD/more_mutant_mod_for_minecraft_pe_mcpe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444648/normal_604e2c5ce19ad.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/hagdjfl/jepopifawawataver.pdfIn PDF document text
    • https://cdn.sqhk.co/vizefejij/gjcnbge/15031139366.pdfIn PDF document text
    • https://cdn.sqhk.co/simikimira/6ggDQct/nabidezinimol.pdfIn PDF document text
    • https://lasebotoxuxuxir.weebly.com/uploads/1/3/4/7/134729765/5149822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470223/normal_60250daf98d8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450151/normal_60058d05e31ff.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/Ddgc2ih/nascar_speedpark_coupon.pdfIn PDF document text
    • https://cdn.sqhk.co/kimorotadopo/FUiarjE/pirebodilim.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/Lhijhgh/police_officer_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/ehaRba2/84927696557.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383704/normal_5fefcc79b612a.pdfIn PDF document text
    • https://libodarupebixab.weebly.com/uploads/1/3/0/9/130969674/8134597.pdfIn PDF document text
    • https://cdn.sqhk.co/badilapo/eghuJgh/5107716961.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/jbhbha5/nasusanipesenuvife.pdfIn PDF document text
    • https://cdn.sqhk.co/talurelope/ccTVsi5/lumarosov.pdfIn PDF document text
    • https://cdn.sqhk.co/veladaxuzeba/dD1fTMS/rave_videos_with_friends_desktop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413845/normal_6003ac6a8715d.pdfIn PDF document text
    • https://cdn.sqhk.co/leguzufaju/iihefii/black_beauty_cast_iron_stove_polish.pdfIn PDF document text
    • https://votilolezin.weebly.com/uploads/1/3/4/3/134307270/3d75648.pdfIn PDF document text
    • https://cdn.sqhk.co/vonewesipan/gR7jejd/mastering_physics_homework_answers.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/42807701-8196-414d-b8b4-e25b9111536d/58005566957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82eb55f9-8cb5-494f-91c5-e12ad5268e22/34213073790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c81705c-65fb-41ac-b4dc-7cd700751e74/zazekefapodazikib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2571963c-3e0f-497f-87ff-d3da5c3dc092/do_covert_narcissists_feel_empathy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2d676e-bf64-4787-b281-e10f5fc00d85/john_deere_650_750_tractor_service_repair_manual.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_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 5248 bytes
SHA-256: 17dc35e599c44765403aec29ba0111390bae13710c875b61f5f7d6e00010d38a
font_01_sfnt_off0000ffbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBF 11244 bytes
SHA-256: afb214ca789d796aee0dceac5793c44c4cd0b4dc5334b35680a95a67efdb23f3