Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5f56ad269c1499…

MALICIOUS

PDF

155.4 KB Created: 2021-03-21 03:46:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 373529408a499bafdfb850e5f18a9503 SHA-1: ab538c1a9d22a7258b47ac3df81ccab487538c30 SHA-256: be5f56ad269c14999e9ea767ed99dfb4d7ef7efe2c009c37f1d1388cf55e56c2
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 pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy to distribute malicious links. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://xezojetit.ru/wix?keyword=dbq+23+decolonization+and+revolution+essay PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5fd267be9f363.pdfIn PDF document text
    • http://pewujok.mypressonline.com/89594115677.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458837/normal_5ff682b0ad797.pdfIn PDF document text
    • http://jidapuxedepu.medianewsonline.com/15197445135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474450/normal_601fa235dd0fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_6045c391db91f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448992/normal_5fefc128b389e.pdfIn PDF document text
    • http://lewulumotuf.iblogger.org/70211409592.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/72902597804.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447107/normal_60031fbf42f94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383156/normal_6015e9a633f9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412773/normal_5ff0b1e2d90a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476751/normal_6007b53d8e624.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/93097464864.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://momodew.epizy.com/iec_standard_for_transformer.pdfIn PDF document text
    • http://peforuk.rf.gd/kenmore_mini_ultra_sewing_machine_parts.pdfIn PDF document text
    • http://jagofebasej.epizy.com/33303552880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d6c618-0752-4260-8bee-c216f287b07d/best_forex_trading_books_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216f66ad-894b-41dc-aced-90ab2674daa4/34635405107.pdfIn PDF document text
    • http://fujesotes.epizy.com/cessna_150j_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4028e48-47ab-4ed8-a1b8-f1157a6025b0/how_to_find_the_volume_of_a_cone_in_terms_of_pi.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/72687114023.pdfIn PDF document text
    • http://pusolegulijased.rf.gd/casio_g-shock_connected_gmw-b5000d-1jf_radio_solar_watch.pdfIn PDF document text
    • http://jutenudolis.epizy.com/christopher_martin_songs_mp4.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_off00022498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22498 5704 bytes
SHA-256: 8e09e5e008ac898525c2b7aebf472aa88729c29e2018555adaa6c2712f0fd8b2
font_01_sfnt_off00023827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23827 12384 bytes
SHA-256: 75fb91fa1ba8b20639a200f1adbc399ec3c0e61e925d332fe9a15cbc48da5b55

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