Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c8843a7ae84f8b…

MALICIOUS

PDF

94.2 KB Created: 2021-03-08 20:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e22663bcb6927118a6e8137bcfdf91cf SHA-1: 120c9d307f6120d0722b74847a29fc8970ae6e36 SHA-256: f1c8843a7ae84f8b5abb56bf72b12ce7c2a589ebaf62b125c51d3e627caea86d
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name of Pdf.Phishing.Trojan. The heuristics indicate it uses an advance-fee scam lure, presenting itself as a free download for a book while containing an external URI to a suspicious domain. This suggests the document is designed to trick users into clicking a malicious link to obtain a prize or file, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/award?keyword=chronicle+of+a+death+foretold+pdf+free+download
    • https://static.s123-cdn-static.com/uploads/4369183/normal_5ffffd433b1c8.pdf
    • https://cdn.sqhk.co/busosuwik/UZzwfsP/30297883374.pdf
    • https://cdn.sqhk.co/rolileduvof/haLEsie/pawapubigov.pdf
    • https://cdn.sqhk.co/wimedizi/Hghghhf/kabekumuguxuwozamitebix.pdf
    • https://cdn-cms.f-static.net/uploads/4403684/normal_5fd1041be7ea6.pdf
    • https://cdn.sqhk.co/xopuxuvop/vgdjdjj/36663960840.pdf
    • http://fovikoxesaweziz.medianewsonline.com/what_should_i_do_if_my_heat_pump_freezes_up.pdf
    • https://cdn.sqhk.co/livoluxuwad/MMkghjc/police_pursuit_2.pdf
    • https://static.s123-cdn-static.com/uploads/4456387/normal_60033fe1c0bcc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wexukufedepim/cookie_policy_template_uk.pdf
    • https://s3.amazonaws.com/fosawef/20890266666.pdf
    • https://s3.amazonaws.com/lupuvogotog/rarifajisupi.pdf
    • https://s3.amazonaws.com/nazekisigiduz/dragon_ball_fighterz_android_21_moveset.pdf
    • https://s3.amazonaws.com/fezenur/cheating_apps_for_iphone_and_android.pdf
    • http://noroved.myartsonline.com/3516981562.pdf
    • https://s3.amazonaws.com/lixisariwulo/what_is_to_be_done_lenin.pdf
    • https://s3.amazonaws.com/pujinit/lisuwajogeruf.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121e1.bin
0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121E1 6744 bytes
font_01_sfnt_off000132c8.bin
6e9cb8ffb76164d5c196fdbfb880b771250fbea22253fa8007f8e0ff41fee904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132C8 5064 bytes
font_02_sfnt_off0001440a.bin
cbc4bde2c3f52a85ca3cf3415b79bd2e7daf31c8b4f0337c5b9fb0456018be6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1440A 10896 bytes

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