Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc5a0514e3e304c…

MALICIOUS

PDF

167.1 KB Created: 2021-05-28 05:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83e587b4315a8117fe0df9c6b98142de SHA-1: 942e59d16a4fa2e8db997ff1b310063538224810 SHA-256: 2fc5a0514e3e304c68df69e062be76d9099132f29c0604a9af449dc3c642761c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely the primary lure. The document body, though heavily obfuscated, appears to reference 'Lg v20 android 9.0 pie', suggesting a lure related to mobile devices.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/strik?utm_term=lg+v20+android+9.0+pie
    • https://static.s123-cdn-static.com/uploads/4482406/normal_5fcee37047221.pdf
    • https://cdn-cms.f-static.net/uploads/4393483/normal_604ae0f585f3d.pdf
    • https://visofamawuri.weebly.com/uploads/1/3/2/3/132303269/kupasunew-betowo-monagivo-riwesek.pdf
    • https://static.s123-cdn-static.com/uploads/4403263/normal_5fc6d54fefd25.pdf
    • https://cdn-cms.f-static.net/uploads/4393186/normal_603b9d93a1d92.pdf
    • https://cdn-cms.f-static.net/uploads/4391047/normal_602fabab22168.pdf
    • https://xalojuxovev.weebly.com/uploads/1/3/0/7/130774978/bevuxasorotijajepado.pdf
    • https://cdn-cms.f-static.net/uploads/4450152/normal_604912748480e.pdf
    • https://cdn-cms.f-static.net/uploads/4385204/normal_60589fa959886.pdf
    • https://cdn-cms.f-static.net/uploads/4415081/normal_603d533ca910b.pdf
    • https://static.s123-cdn-static.com/uploads/4387052/normal_5fe5edf3e757e.pdf
    • https://cdn-cms.f-static.net/uploads/4489257/normal_601d003712267.pdf
    • https://vafubetuxako.weebly.com/uploads/1/3/4/5/134503762/59636.pdf
    • https://cdn-cms.f-static.net/uploads/4367297/normal_604ed47b96d09.pdf
    • https://cdn-cms.f-static.net/uploads/4368243/normal_606cd10f583db.pdf
    • https://botuwuroxawezu.weebly.com/uploads/1/3/4/7/134713501/2204253.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4c25dbc6-d4bc-46f4-8bdf-156a970a33cc/ximopixule.pdf
    • https://uploads.strikinglycdn.com/files/493b2529-f925-4430-9edf-b3b1d49573c5/donde_esta_eduardo_chapter_6.pdf
    • https://uploads.strikinglycdn.com/files/0c07a945-a430-4521-8169-1348865d735e/mifuwuwetova.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
stream_005_off00021b21.bin
9c731b44c31aff7f46d46afd678d99d515a0f481866659a8005667ec63a9b548
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x21B21 16844 bytes
font_01_sfnt_off00025171.bin
f8f6adb2456587530f94e8d395d43c83b30abaf19d4191869b1329bab3ae4f1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x25171 5380 bytes
font_02_sfnt_off000263e2.bin
c5b8272693e7df5be745aa58818eee668e8c397929f7a2d86ccff1047ac469af
pdf-font-stream PDF embedded font (sfnt) at offset 0x263E2 12264 bytes