Malicious PDF — malware analysis report

Static analysis result for SHA-256 e197853ab60a08f1…

MALICIOUS

PDF

71.4 KB Created: 2021-01-10 11:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ca1a391051d917850e8134ed1ea5895d SHA-1: 2242d041c4a28b7f2953a3f6a6a7089a33e92fb8 SHA-256: e197853ab60a08f19e87896d6b21cbfbbc4e1cc858f9c68ef4d365b17c72c34f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=adobe+flash+player+apk+for+iphone'. This URL is presented in a context that impersonates a software update, likely to trick the user into clicking it. The ML classifier also strongly flagged this PDF as malicious.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=adobe+flash+player+apk+for+iphone In PDF document text
    • https://cdn.sqhk.co/kekumumaxow/jfjjy8t/tebexeliv.pdfIn PDF document text
    • https://site-1178858.mozfiles.com/files/1178858/tangled_rapunzel_song_mp3_download.pdfIn PDF document text
    • https://site-1174394.mozfiles.com/files/1174394/murder_hornet_removal_washington_state.pdfIn PDF document text
    • https://cdn.sqhk.co/xonoguduzob/hcjd1ha/thoroughly_enjoyed_something_crossword.pdfIn PDF document text
    • https://site-1178471.mozfiles.com/files/1178471/junegaxitibo.pdfIn PDF document text
    • https://cdn.sqhk.co/wefopijupe/9jiVHMN/minecraft_new_mobs_mod_1._7._10.pdfIn PDF document text
    • https://cdn.sqhk.co/jivomawufem/gijgggh/zezajakarufewupupemanip.pdfIn PDF document text
    • https://cdn.sqhk.co/pavetikedur/gcahgoN/taxomiviminuj.pdfIn PDF document text
    • https://site-1172464.mozfiles.com/files/1172464/highway_racing_car_racer_3d.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/jadere/11th_english_medium_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/lexad.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/belkin_wemo_smart_switch_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/83425650034.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/5158179040.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_off0000da99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA99 5424 bytes
SHA-256: b1d85c22e68a3847643158a8feca3dcc6dad76c4a09020b31a60b8c98f99b64b
font_01_sfnt_off0000ed06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 10496 bytes
SHA-256: 9de906dbb2caf1c3044b04b1a5af0f23d6e792234b27ba704918dd0123d489d2

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