Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ff8685462521b6…

MALICIOUS

PDF

94.0 KB Created: 2021-04-07 21:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c1d6699a2bd2e09e1ef498244c2387e SHA-1: a32432b86059bfce9ac31de9b49e35f14f5af718 SHA-256: a3ff8685462521b6b591909894165a6143cc88081b79d038fec344352ceefe3d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://lozipotod.ru/123?utm_term=acog+ascus+guidelines` suggests a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=acog+ascus+guidelines
    • https://cdn.sqhk.co/jepivitixiwo/5BgiPYc/srs_vidyapeeth_samana.pdf
    • https://falesejus.weebly.com/uploads/1/3/1/4/131483218/221ec80c4.pdf
    • https://kenafowipadile.weebly.com/uploads/1/3/1/4/131437871/mozujewigirozi.pdf
    • https://cdn-cms.f-static.net/uploads/4470685/normal_605465519e6df.pdf
    • https://cdn.sqhk.co/jedugifaxido/hggjihe/77889660336.pdf
    • https://static.s123-cdn-static.com/uploads/4370740/normal_5fe1b69ed3e93.pdf
    • https://cdn-cms.f-static.net/uploads/4366337/normal_60215cd048b15.pdf
    • https://foxenaduro.weebly.com/uploads/1/3/1/1/131164157/kafefez-sofujinonedo-seboj.pdf
    • https://cdn.sqhk.co/rejoxapuzopa/PiiViay/bad_banker_jokes.pdf
    • https://cdn-cms.f-static.net/uploads/4496374/normal_603d2ce21842b.pdf
    • http://jagodadexujuza.iblogger.org/barcelona_map_tourist.pdf
    • https://cdn-cms.f-static.net/uploads/4450418/normal_6053790144891.pdf
    • http://xavelodezazil.iblogger.org/tulituvexajis.pdf
    • https://cdn-cms.f-static.net/uploads/4492574/normal_6064914dc99b0.pdf
    • https://kavavori.weebly.com/uploads/1/3/4/0/134012315/jisopuvowo_lafivub_rejarope.pdf
    • https://vokufasel.weebly.com/uploads/1/3/4/8/134872836/2962050.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ragigixo.epizy.com/silofaxetosow.pdf
    • http://mukagodikuve.rf.gd/carlos_castaneda_way_of_the_warrior.pdf
    • https://s3.amazonaws.com/saziwijaxodav/60820173798.pdf
    • http://nawupewiviziwik.rf.gd/fisiopatologia_placa_de_ateroma.pdf
    • https://s3.amazonaws.com/kiremefegonar/tutoso.pdf
    • https://s3.amazonaws.com/ninazarila/android_games_free_apk_action.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_off00013375.bin
5585e27d52de69fc0f5e909b1d751dfae58f12afd0916e1177736af72961aa59
pdf-font-stream PDF embedded font (sfnt) at offset 0x13375 5000 bytes
font_01_sfnt_off0001448b.bin
198a2d66b75e518c55bd39db509f2cfab36c607321ba5118aaae0e448a3f7888
pdf-font-stream PDF embedded font (sfnt) at offset 0x1448B 11156 bytes