Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3a0a09a95ce3f7…

MALICIOUS

PDF

75.5 KB Created: 2021-04-02 22:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc9d0f9e474b9f888106404596e73189 SHA-1: 515119afcc40790557d80bb08d8d174e43fb27b6 SHA-256: 8f3a0a09a95ce3f734480963f5e574c6a0574bdd419f78754f2071af1152e66c
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that redirects to a domain associated with malicious activity, likely intended to deliver a second-stage payload or phish for credentials. The document body, though heavily obfuscated, contains keywords that suggest a lure.

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://xezojetit.ru/wix?keyword=golden+high+school+football
    • http://lanufutado.22web.org/convert_files_to_autocad_free.pdf
    • https://cdn-cms.f-static.net/uploads/4374368/normal_6020b0b69b3d1.pdf
    • https://jigugelelatowo.weebly.com/uploads/1/3/1/4/131437208/5a769.pdf
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/f57f8b0666.pdf
    • http://pilawufatazuka.iblogger.org/nuvofisekuwogugara.pdf
    • https://cdn-cms.f-static.net/uploads/4443372/normal_6061fd9ab1a26.pdf
    • https://cdn-cms.f-static.net/uploads/4464709/normal_605ab3a84311a.pdf
    • https://cdn-cms.f-static.net/uploads/4485576/normal_5fe79ee130434.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kaxasasetepub.epizy.com/narorunaforaseluxexabutej.pdf
    • http://fekerudosepu.rf.gd/plastic_animation_app_for_android.pdf
    • http://fepadegan.epizy.com/girlfriends_guide_to_divorce_episodes_season_5.pdf
    • https://s3.amazonaws.com/rijaliwiguvex/causas_del_abandono_animal.pdf
    • https://s3.amazonaws.com/fogibi/16833581726.pdf
    • https://s3.amazonaws.com/vibuvomomuv/apex_legends_error_easyanticheat.pdf
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_cb85b5970953481da357f0d28adfca6e.pdf?index=true
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_a3020c5a7eb240158129f1e7963623c7.pdf?index=true
    • https://s3.amazonaws.com/dupula/21513131024.pdf
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_c787bbdeebda45e4aaa15f392aece7d2.pdf?index=true
    • 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_off0000eab0.bin
557b0f596e62cd0bce912162d2f30ce687dc66d521caeb7170ed6a15ba34c6e0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 5356 bytes
font_01_sfnt_off0000fcea.bin
e72b9ff74837487a4fa6545be408165467cb651a02e17ced161261b9a908d55f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 10496 bytes