Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2727b703174744…

MALICIOUS

PDF

78.8 KB Created: 2021-04-03 21:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dce13cfd50885563ebde7e80dd60d4cb SHA-1: 41ba3cbd2b08266f9962e1a684436a3c82a1bccd SHA-256: 1d2727b7031747449cc7d8e76e9d0628efcf905ce24c3465c6b520e6e829cc3a
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. The embedded URL points to a domain that is likely involved in distributing malware, disguised as a free download. The document body, though heavily obfuscated, contains keywords related to downloads, suggesting a lure.

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://seumenha.ru/strik?utm_term=ruqyah+shariah+mishary+rashid+mp3+free+download
    • https://cdn-cms.f-static.net/uploads/4475715/normal_604b763d95c21.pdf
    • https://cdn.sqhk.co/suxujaba/hjdwjbl/recargas_a_cuba_con_ding.pdf
    • https://cdn-cms.f-static.net/uploads/4452595/normal_603ba392723fb.pdf
    • https://cdn-cms.f-static.net/uploads/4426679/normal_6049950d78e11.pdf
    • http://sesugato.iblogger.org/is_firestick_compatible_with_directv.pdf
    • https://cdn-cms.f-static.net/uploads/4458634/normal_6060ca114cfb7.pdf
    • https://cdn-cms.f-static.net/uploads/4499283/normal_603161109b896.pdf
    • http://kuwawaf.mypressonline.com/kutasuwonusax.pdf
    • http://zitirisiz.mywebcommunity.org/zumajewura.pdf
    • http://lilakasidosusuw.iblogger.org/papirojibigixug.pdf
    • https://cdn-cms.f-static.net/uploads/4486565/normal_604dc619abf7f.pdf
    • https://static.s123-cdn-static.com/uploads/4459182/normal_5ffc588b088f3.pdf
    • https://cdn-cms.f-static.net/uploads/4477400/normal_60623cfe1d313.pdf
    • https://cdn.sqhk.co/dofexoxev/iexjdia/xuxabojopenazem.pdf
    • https://cdn.sqhk.co/jarixizotib/ggQjcgf/47562406197.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://niwakilapiso.rf.gd/2016_honda_odyssey_transmission_replacement_cost.pdf
    • http://lolurisufetofel.epizy.com/19943735252.pdf
    • http://xiwozoget.atwebpages.com/76516176920.pdf
    • https://uploads.strikinglycdn.com/files/f71e138a-22e6-4c33-a453-40b968af7582/rugigimus.pdf
    • https://uploads.strikinglycdn.com/files/3cbb5be2-43eb-41a7-aa24-285f27f58e8b/zawurilosazamipesenogur.pdf
    • https://uploads.strikinglycdn.com/files/e18f52d1-2be2-4c05-8973-8c234f0eca34/how_to_update_my_cloud_firmware_manually.pdf
    • https://uploads.strikinglycdn.com/files/609800fe-b5ce-4300-8db6-c6ea9c82091c/zalutututuzuwuw.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_off0000f5e3.bin
cae11d0d462111f939dff7ade379e17da1e815192ca6c0776a9c9790cfb7f759
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E3 5772 bytes
font_01_sfnt_off00010982.bin
871b166b61bfc115c82306f0368b4d21456599a9a5520dbacf8f26914ea9e279
pdf-font-stream PDF embedded font (sfnt) at offset 0x10982 10612 bytes