Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f921aa165459560…

MALICIOUS

PDF

75.9 KB Created: 2021-03-21 02:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce729095d93431736b52f826c3a4917d SHA-1: 7b807a6e5f0482507a17c1dd7a660c471551fbcc SHA-256: 3f921aa1654595609ca1b8d3320757422d05425de07309eca93b9ba2eb40c240
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/wix?keyword=sears+riding+lawn+mower+manual
    • https://static.s123-cdn-static.com/uploads/4448115/normal_5feaff3214920.pdf
    • https://static.s123-cdn-static.com/uploads/4451567/normal_5ff661e77ed8c.pdf
    • https://cdn-cms.f-static.net/uploads/4444371/normal_6036c2b8d6bab.pdf
    • https://bazojosazim.weebly.com/uploads/1/3/6/0/136086377/wusadan-sotosili.pdf
    • https://cdn-cms.f-static.net/uploads/4368770/normal_60313bf65f98e.pdf
    • https://kodanefonilulev.weebly.com/uploads/1/3/4/7/134702772/nerexefopesiko_vamujiwadone.pdf
    • https://cdn.sqhk.co/pinufizugal/N3hgYjh/mufadatekitilorolusovuf.pdf
    • https://buxijoxusezo.weebly.com/uploads/1/3/1/4/131483018/4203225.pdf
    • https://static.s123-cdn-static.com/uploads/4404987/normal_5fce9a490e60b.pdf
    • https://lilikegemuvil.weebly.com/uploads/1/3/1/3/131398424/7607816.pdf
    • https://cdn-cms.f-static.net/uploads/4495043/normal_604136442f40d.pdf
    • https://nalepigetor.weebly.com/uploads/1/3/0/9/130968958/duwilojise_wesip_letovuteluxuj.pdf
    • https://vidimepimexuja.weebly.com/uploads/1/3/4/6/134626803/5506205.pdf
    • https://cdn-cms.f-static.net/uploads/4490128/normal_604a2c0c5737f.pdf
    • https://cdn.sqhk.co/mujekesire/jelhagd/can_contacts_change_eye_colour.pdf
    • https://bixavovene.weebly.com/uploads/1/3/0/7/130775743/pireweru.pdf
    • https://cdn.sqhk.co/goxobuve/hfyFihr/sedozomalumede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/napisakaluja/23811680022.pdf
    • https://s3.amazonaws.com/padadutiseni/45502467783.pdf
    • https://s3.amazonaws.com/wizitifowubux/mebemus.pdf
    • https://s3.amazonaws.com/jidagafinuxesu/tufexanusikamujizof.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_off0000ec3e.bin
c7acad19b5828e8121bb0e0df04726d5449e1e1b2b66fc87d7534a84323bc6d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 5340 bytes
font_01_sfnt_off0000fe5f.bin
f8287c8fc0e4a5904809b19865518b344e626e3dd68437f6154e324c42163829
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5F 10524 bytes