Malicious PDF — malware analysis report

Static analysis result for SHA-256 e741c7e6ed585465…

MALICIOUS

PDF

76.8 KB Created: 2021-04-05 08:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ffaa283f1faedb8d5d02682f0d51568f SHA-1: 460896d752873661c28f843852c2358420b1ff78 SHA-256: e741c7e6ed585465de6fa79b6568fc2f5a9138a1db9bf6c6c471112e145651e4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as search result links, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/strik?utm_term=why+is+my+kenmore+fridge+not+cold PDF link annotation
    • http://izzzaaa.space/which_element_has_the_largest_atomic_radius_in_group_180te1h.pdfIn PDF document text
    • http://interior.estate/which_exercise_is_best_for_longevityw55ad.pdfIn PDF document text
    • http://sport-stavki.fun/mexakadabetasufubm3b0.pdfIn PDF document text
    • https://cdn.sqhk.co/lonubugogere/7Ufhbgg/94001897722.pdfIn PDF document text
    • https://cdn.sqhk.co/goganededem/cKLtMji/gravity_blanket_amazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502236/normal_605f6638a09d7.pdfIn PDF document text
    • https://zumugerajezu.weebly.com/uploads/1/3/1/1/131163828/sexozosipapepesit.pdfIn PDF document text
    • https://sokezimipadivob.weebly.com/uploads/1/3/5/9/135959039/93128d2c577.pdfIn PDF document text
    • http://llloooodddd.space/44008717944b331y.pdfIn PDF document text
    • https://sarajigirokoxi.weebly.com/uploads/1/3/5/3/135300612/2e3a815b43e59e.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/qjhfFF9/midge_fly_larvae_pictures.pdfIn PDF document text
    • https://sutivekawexebe.weebly.com/uploads/1/3/1/6/131636655/6250084.pdfIn PDF document text
    • https://cdn.sqhk.co/lazaxosu/ijgf0ha/dazoxe.pdfIn PDF document text
    • http://rukozhop-guide.com/forgotten_realms_calendar_printablerlgpw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407318/normal_605105f38c95e.pdfIn PDF document text
    • http://storeeu.info/65650648661uzrq7.pdfIn PDF document text
    • https://vujebitaj.weebly.com/uploads/1/3/4/7/134759162/05d584c0fb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/movod.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/66404510220.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/13359764360.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/cadet_college_hasan_abdal_application_form.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_off0000ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 5404 bytes
SHA-256: 6cb86c9840b8b1a627228c3f3b0edf995bc45dd5f82da93b6769725aa7552e19
font_01_sfnt_off000101f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F0 10484 bytes
SHA-256: c9f87e7a59e505e8cb1ea8c5d9d8ee910f0ecaa22b32597780a0fb21851e4fd5

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