Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbef70c49c23d43f…

MALICIOUS

PDF

76.8 KB Created: 2021-03-23 19:30:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6d247c9dd13a276963c2df0d6c33b6e SHA-1: dc354c24676ecafcfd725682648b3289528b4863 SHA-256: cbef70c49c23d43f5c3c4ba9dc0a2393f849ab637896a73511a5fd606e72dc80
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious URL, likely intended to redirect the user to a phishing or malware download site. The document body, though heavily obfuscated, contains text related to product pricing, suggesting a lure to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=precio+amplificador+alpine+mrv+f300
    • http://autobuff.xyz/dobipofuw4hpum.pdf
    • https://static.s123-cdn-static.com/uploads/4444115/normal_5ffde3ae2765c.pdf
    • http://hangookoil.ru/19541420768mj7p6.pdf
    • https://static.s123-cdn-static.com/uploads/4409421/normal_5ff8104d691cb.pdf
    • https://cdn-cms.f-static.net/uploads/4411231/normal_605401cc0c962.pdf
    • http://nesebonuvobeju.getenjoyment.net/numark_ttusb_review.pdf
    • https://lolizafopig.weebly.com/uploads/1/3/1/4/131453679/leziwedun.pdf
    • http://goldotzyv.ru/dedarabadogapuruxehmsdo.pdf
    • http://xepelewatelaziv.getenjoyment.net/moultrie_w35i_game_camera_for_sale.pdf
    • https://rupevegix.weebly.com/uploads/1/3/4/8/134887155/fujidedeki_lazadakipoxurox.pdf
    • http://yewes.fun/domain_and_workgroup86qko.pdf
    • https://cdn-cms.f-static.net/uploads/4379241/normal_602d9ba6d20f9.pdf
    • http://libralab.digital/gidoronilitokifisgw78m.pdf
    • https://pimoraruwozego.weebly.com/uploads/1/3/2/7/132712303/7328111.pdf
    • https://cdn-cms.f-static.net/uploads/4488329/normal_603e2f5433401.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://taberadajip.atwebpages.com/electro_dynamics_physics.pdf
    • https://uploads.strikinglycdn.com/files/aa9c1d8f-9c1a-44d4-80e0-03d2db4f15e8/xeziguxumiruxexajexu.pdf
    • https://uploads.strikinglycdn.com/files/84ad525e-ab37-459e-8ffb-0cc2edf1348c/to_kill_a_mockingbird_character_worksheet_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec49.bin
4d0580f2a27a524944f685c86fe018931fcb7bcc1e531593ffa7cff1919235f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC49 5488 bytes
font_01_sfnt_off0000feee.bin
24e71d79b4cab52905262a7465e43caaea6ba109004d59cbefda0009df292e31
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEE 11644 bytes