Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e7c32fd084475c…

MALICIOUS

PDF

71.2 KB Created: 2021-02-27 06:26:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70b2058cc24a7f665a2904757011b45c SHA-1: 7507c0f4d3d8190960a050a1c7a36fe3ad2d01e6 SHA-256: a1e7c32fd084475c42e15a1e722adb8562b1b61f1ad8b3da18099c13535949d6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating phishing and trojan characteristics. The embedded URL points to a suspicious domain, likely serving as a lure for users to click and potentially download further malicious content or be redirected to a phishing site. The document body, though heavily obfuscated, contains keywords that might be used to trick users into opening the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=pobre+ana+summary+of+each+chapter
    • https://cdn-cms.f-static.net/uploads/4477376/normal_5fd80cd4c0242.pdf
    • https://cdn.sqhk.co/zevolazezag/gdwifge/mokesagofo.pdf
    • https://cdn.sqhk.co/jupozaregu/HGcjg4V/elevator_room_escape_walkthrough_unblocked_games_66.pdf
    • https://cdn.sqhk.co/gewanunu/vjbjXjc/conquest_3_kingdoms_mod_apk.pdf
    • https://cdn.sqhk.co/rorajakura/hf1hi2W/9654893734.pdf
    • https://cdn-cms.f-static.net/uploads/4497688/normal_60303a17a8a0a.pdf
    • https://static.s123-cdn-static.com/uploads/4463264/normal_5ff9e4e0e26d2.pdf
    • https://cdn.sqhk.co/nejajevafode/ah4jd7p/byte_video_communities_apk.pdf
    • https://cdn.sqhk.co/gidenateg/icx2hdI/73968737022.pdf
    • https://cdn-cms.f-static.net/uploads/4421623/normal_600be4f4c1d8e.pdf
    • http://delinapod.mypressonline.com/steps_on_starting_your_own_business.pdf
    • http://xexajume.iblogger.org/sakugakekatuxowesiloruke.pdf
    • https://cdn.sqhk.co/letaziseb/gLrjbhd/jiludajoratorerixuresedi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://galojuxutiwas.epizy.com/46734115447.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_off0000daf5.bin
dac061442491c3b2e04302f7239d93e7c25552ab4b341e2bfdc97d6e175fecb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF5 5468 bytes
font_01_sfnt_off0000ed6b.bin
bf62ce5464a68a03154df09f96eefe85979847a84c94c2e9130a29c18dcdaa89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 10148 bytes

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