Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b07c667f0566b1…

MALICIOUS

PDF

74.8 KB Created: 2021-02-20 23:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: e7ca6c38884a34e9fd72f4edaf5c4200 SHA-1: 5f3717886dbdeaef7b1289d98a5bb16cdb3a2b41 SHA-256: 64b07c667f0566b1e8b67a928004e22e725d2797668a5328d6b1898c0a6d1a62
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected this file as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to health information, likely intended to trick users into clicking the malicious link.

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://baarspo.ru/aws?utm_term=how+much+iodine+do+i+need+while+breastfeeding PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404308/normal_600673ea16077.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/evbhfEV/33109322432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412568/normal_5ff813e3b94f6.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/JhgeihE/traffic_tour_apk_mod_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493541/normal_6023bb58d2d43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412583/normal_5fd3928ea5c96.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/ajeVcVj/nolonexi.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/5hakghf/xisuvazateliwale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gogunabones/12931873195.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/97959739834.pdfIn PDF document text
    • http://rezopokus.epizy.com/suvifugoxutimigobagole.pdfIn PDF document text
    • http://bomepexajusopa.epizy.com/hach_890_colorimeter_manual.pdfIn PDF document text
    • http://paxubar.rf.gd/declaration_of_independence_questions_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/cakram_genetika.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/pisafas.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/58457807239.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/boduguxinataforevekatoji.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/vajunurikanuwuni.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/pufupugukaposanilidibola.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E9 5628 bytes
SHA-256: 06af67d78f0bbc64c569e0f6bc014bec91fc291b78d45fbc74986801a0fac046
font_01_sfnt_off0000f8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F0 10652 bytes
SHA-256: 728eeac80e0964b755fece00bf110e4e46c2c9dd70641a97870ffc039761a853

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