Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e4ce9340c9be64…

MALICIOUS

PDF

76.7 KB Created: 2021-03-07 08:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02805e5a56c903af0bee500f16fea7c0 SHA-1: d2a0b7730b2dcefb67c6d748309b9ce58ee19ff2 SHA-256: a5e4ce9340c9be64eb98992465c47566a2a51b804b4d4f4b7bba548929537c27
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. The document body, though heavily obfuscated, suggests a lure related to a "Victsing bluetooth keyboard manual", likely intended to trick users into clicking the malicious link.

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://bologen.ru/wix?keyword=victsing+bluetooth+keyboard+manual
    • https://cdn-cms.f-static.net/uploads/4385614/normal_602465a2e829e.pdf
    • https://cdn.sqhk.co/zoluxoni/1PUgfgf/new_sad_ringtone_2020_mp3.pdf
    • http://vipadminler.org/basupifak2jzc.pdf
    • https://cdn.sqhk.co/jiwonukunav/gh00Dgf/gilufot.pdf
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/214747.pdf
    • https://cdn-cms.f-static.net/uploads/4454819/normal_5fd97b6827a12.pdf
    • http://eurofamily.pro/15322737136g7sc7.pdf
    • https://tilakajunobeka.weebly.com/uploads/1/3/0/7/130739719/nazopepiru.pdf
    • https://cdn-cms.f-static.net/uploads/4491936/normal_5fd7cd8630545.pdf
    • http://akillidestekbasvuruformu.online/3072151309d72m0.pdf
    • https://cdn.sqhk.co/letareximo/gf1ghhi/ripakobopaval.pdf
    • https://static.s123-cdn-static.com/uploads/4453747/normal_5ffe66e9f19e7.pdf
    • https://static.s123-cdn-static.com/uploads/4422134/normal_60089b02aa14d.pdf
    • https://cdn-cms.f-static.net/uploads/4385880/normal_5fd8e9d05fdb8.pdf
    • http://mavpa.fun/xilukawokenagalabyntfy.pdf
    • https://static.s123-cdn-static.com/uploads/4473039/normal_5fdc9e60724f2.pdf
    • http://freshmind.net/vaxamelegamawufiligad9ja1.pdf
    • http://makedctl.site/posobejubowumorumelijf0hd.pdf
    • https://cdn-cms.f-static.net/uploads/4460980/normal_602acffc8a3b1.pdf
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5fd6f1f756fed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
font_00_sfnt_off0000d237.bin
340db9072fa30df6a19ab2f4b05cc55370079e236a9b6f38fae8cb9f5083ef09
pdf-font-stream PDF embedded font (sfnt) at offset 0xD237 4460 bytes
font_01_sfnt_off0000e1c0.bin
32c39304330e9f5e4959bc933db50c3441a6199e0e2240406d78200cb413d63f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C0 5624 bytes
font_02_sfnt_off0000f4b9.bin
59bc2eafb01954fd7784b4bb9c91337b8f442aac99f3ab8c9504bdaaadb968a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 15024 bytes