Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c6b462bb340b58…

MALICIOUS

PDF

174.5 KB Created: 2021-03-28 23:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4531ba81fdfed6c0c40a1f87c31628e SHA-1: 2be4d291fb0a35b1c2fdcf606cc3c922997d7fb3 SHA-256: d5c6b462bb340b5823aa30e93d196e500afe7c3501d9da52897857ef33434866
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Alice in Chains full discography' to entice users to click the malicious link. No scripts were extracted, but the presence of external URIs and the high ML score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/123?utm_term=alice+in+chains+full+discography
    • http://jokebixa.22web.org/what_does_enochian_mean.pdf
    • https://cdn.sqhk.co/febapaji/uicgfif/vinikipanubobo.pdf
    • https://tivaxuxilo.weebly.com/uploads/1/3/4/1/134131375/1611561.pdf
    • https://cdn.sqhk.co/dupezijetibi/b5KaKhh/67411508758.pdf
    • https://cdn-cms.f-static.net/uploads/4489843/normal_602a52a701388.pdf
    • https://cdn-cms.f-static.net/uploads/4417128/normal_60503ed0c5505.pdf
    • https://cdn.sqhk.co/goremujoz/JcwiawV/knock_down_door_frame_installation.pdf
    • https://cdn.sqhk.co/pininipata/iiYe2ij/alto_s_adventure_free_for_iphone.pdf
    • https://cdn-cms.f-static.net/uploads/4393179/normal_605b22dc866f3.pdf
    • https://cdn.sqhk.co/zenekukera/ija3ay8/coin_master_app_cloner_ios.pdf
    • https://nejotadig.weebly.com/uploads/1/3/1/1/131164569/823960261ad4393.pdf
    • https://cdn.sqhk.co/wujamufaw/jaHvNgj/nesamut.pdf
    • https://cdn.sqhk.co/sopiloroda/Qhahigj/norukexuru.pdf
    • https://zarimuxeve.weebly.com/uploads/1/3/4/8/134897304/wajiboj.pdf
    • https://cdn.sqhk.co/rirakibugo/ihe3Pja/madodazojuvi.pdf
    • https://cdn.sqhk.co/zepipawetopi/Didojiw/sasovatowuseburawetuxage.pdf
    • http://zawugexoj.22web.org/73075467606.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lesiterifok.epizy.com/florida_collections_textbook_answers_7th_grade.pdf
    • http://tijopuzotozume.rf.gd/15468236113.pdf
    • http://podekorutad.rf.gd/29495390851.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000263d2.bin
7549c0de642665796aead923a9600ccca178ea8a62db019e8088342c3d0beb7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x263D2 5308 bytes
font_01_sfnt_off000275ce.bin
baea37c86cd0a6b8e3f100d2b86fd2de6a50e959d0523d1bf8e8109b4f743c34
pdf-font-stream PDF embedded font (sfnt) at offset 0x275CE 12092 bytes
font_02_sfnt_off00029d8b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x29D8B 4324 bytes