Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8d2d5e3fff9bff…

MALICIOUS

PDF

68.1 KB Created: 2021-05-01 14:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 13aae3a4f45b28e60a736ce64aab3dff SHA-1: 72c7b7b058656514aae0032fca9c46add41d5ee4 SHA-256: da8d2d5e3fff9bffe158f26f5de59795414a268f4cb7d0c2f6374638c8141853
134 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, indicating a high likelihood of malicious intent. The document presents itself as a practical book PDF, a common lure for phishing or malware distribution. Multiple external URIs were found, with one pointing to a suspicious domain 'resalured.ru', suggesting it may serve as a download or redirection point for malicious payloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=mbbs+pharmacology+practical+book+pdf PDF link annotation
    • http://fimewovoko.getenjoyment.net/55297517456.pdfIn PDF document text
    • https://cdn.sqhk.co/dipopoji/dSithfk/90979711167.pdfIn PDF document text
    • https://mivunibetokujix.weebly.com/uploads/1/3/1/8/131856995/vodiki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418987/normal_5ff7c00967038.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuluxaja/b0XOlhd/bopegugawubi.pdfIn PDF document text
    • https://cdn.sqhk.co/munemuzabuk/pyPhjji/robzone_duoro_xclean_profi_recenze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488346/normal_6059ff5a8b87f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_601a64b6b4007.pdfIn PDF document text
    • https://datirelegewewat.weebly.com/uploads/1/3/4/3/134329883/3961543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_6044cba9d7bba.pdfIn PDF document text
    • https://cdn.sqhk.co/modebopogut/NaShfil/nivuvaxisipiberadeja.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/31813106072.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/Iijjajj/diy_costume_2020_for_guys.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bugenerefajujus.atwebpages.com/barbarians_of_lemuria_legends_of_steel.pdfIn PDF document text
    • https://2ea3657d-1c4c-40dd-8491-58aeeb8dc933.filesusr.com/ugd/18a85a_9ba9de76d96141aebbb40a038387ab5a.pdf?index=trueIn PDF document text
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_31e0ef35e1844b1ca39c2d445ae43ad1.pdf?index=trueIn PDF document text
    • http://beviwemeladi.rf.gd/good_graphic_design_portfolio_examples.pdfIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_edf8f17eed5e489c8644bdb6aa90a0e4.pdf?index=trueIn PDF document text
    • http://lewinozed.atwebpages.com/92571559939.pdfIn PDF document text
    • http://keladuwuk.rf.gd/bromatologia_e_analise_de_alimentos.pdfIn PDF document text
    • http://wolunotolebo.rf.gd/xidixulavawu.pdfIn PDF document text
    • http://kunubuxeduw.epizy.com/jexagukusuxad.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_off0000cbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDC 5880 bytes
SHA-256: 2e032989c1c231299bfc08bb688c06ad8cf6bf9fc40d9a0f5b29b523f89aaeec
font_01_sfnt_off0000dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 10268 bytes
SHA-256: e542bb7406314e3aa39ed3102e8372dcf238b8bad5395abf782fc17d32362e46

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