Malicious PDF — malware analysis report

Static analysis result for SHA-256 0740e6f356ce633d…

MALICIOUS

PDF

70.9 KB Created: 2021-02-27 04:32:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 58852e5bea444a9c833fa1a4d62af897 SHA-1: 92dc54807a2329f3b321f728039c740b1d17ad6f SHA-256: 0740e6f356ce633d65a9f697b61d40f8d9b2a1bed6dc37c3cb28118f6fe2c3b0
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text that appears to be search query terms, suggesting a phishing or redirection lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=harry+potter+part+1+full+movie+in+tamil+youtube In PDF document text
    • http://pefiworawodud.mypressonline.com/fujifilm_xp70_review.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/how_to_turn_on_landice_treadmill.pdfIn PDF document text
    • http://rawenspant.online/vepelerasasavuladasilt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446286/normal_5fcd31feb5a33.pdfIn PDF document text
    • http://vienvozvrat.site/my_talking_angela_game_pleasevq1mh.pdfIn PDF document text
    • http://theplafond.xyz/gikorivepepuvuferafaborb96et.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/mununophjhja.pdfIn PDF document text
    • http://virepidutajal.iblogger.org/uc_browser_apk_old_version_2016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gedamodeges.epizy.com/jokanilusenuzagi.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/99516311009.pdfIn PDF document text
    • http://sokevojufepizi.rf.gd/christian_baby_boy_names_with_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/chloromatic_esr_300_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/cheque_book_request_form_adib.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_off0000d916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD916 5184 bytes
SHA-256: 732c302c2c60ea2df4933820d0998f511e0a16942d414566da37a6ef2b3c7c80
font_01_sfnt_off0000eab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB7 10560 bytes
SHA-256: b550597c35f3bc4af38e2c19220a133a49a917757022c249f628ac97e8d3a17f

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