Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a4565e409745f7…

MALICIOUS

PDF

88.3 KB Created: 2021-03-17 11:35:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7351e9e48067a983cdf8188b0aa2ce55 SHA-1: ecc3031f8b886ed73a481138597f1976e80aaf74 SHA-256: 19a4565e409745f7b34bb75936399a00ce7f9d4db5b2f3724b05cf0256707e38
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, masquerading as a subscription cancellation notice for the Wall Street Journal. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of a malicious URI is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=wall+street+journal+subscription+cancel
    • https://static.s123-cdn-static.com/uploads/4413228/normal_5fc7114bd4fd7.pdf
    • https://cdn.sqhk.co/wogefosa/jfRrZOv/highway_car_traffic_racing_3d_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4501233/normal_60220a114d988.pdf
    • https://cdn.sqhk.co/noremixujor/djg04ha/monster_castle_defense.pdf
    • http://carinsusa.info/54102486115ric82.pdf
    • https://cdn-cms.f-static.net/uploads/4453901/normal_60482f28c10a7.pdf
    • https://libexezelidod.weebly.com/uploads/1/3/1/4/131454359/f04546fde75b.pdf
    • https://static.s123-cdn-static.com/uploads/4413842/normal_60067f1311366.pdf
    • http://pop-marketplace.ru/what_is_the_organizational_structure_of_a_small_businessezioi.pdf
    • https://patobusogeziwe.weebly.com/uploads/1/3/4/0/134096506/9872261.pdf
    • https://cdn-cms.f-static.net/uploads/4411483/normal_603461ab0d105.pdf
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/pipelamanopetar.pdf
    • http://starkrobotics.org/beach_survival_island_2017_moviem9wnj.pdf
    • https://cdn.sqhk.co/mitukutowum/idhdhf9/29021330544.pdf
    • https://cdn.sqhk.co/kewesowovim/dHLxhb4/bomep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8a7d9b6f-abd2-4ab6-be0a-bba142343236/breaking_india_course.pdf
    • https://uploads.strikinglycdn.com/files/e1613495-444b-4dd7-83b8-1a8f5f244adb/46619284447.pdf
    • https://uploads.strikinglycdn.com/files/ec339ad6-8e96-4309-a5b6-2042ef120d4c/shoretel_230_headset_button.pdf
    • https://uploads.strikinglycdn.com/files/cf64215b-1768-4a62-a59b-0abef88c4ed7/call_of_duty_black_ops_2_save_editor_xbox_360_iso.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_off00011bc5.bin
a8ecbbc5cca8756c299c3e4dee48ee2cdf9c96f8737286415b1741724a9cc54c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC5 5156 bytes
font_01_sfnt_off00012d6b.bin
abb3f9b254256f19f4a6dc9aa59b127c3757efebb3339a0d5c02af7cf2ea8279
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6B 11208 bytes