Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62246a2cb453b4c…

MALICIOUS

PDF

77.5 KB Created: 2021-03-16 15:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66c84e2f8f818e69a9aa46ec69d74dc2 SHA-1: ec2424aebfd3f75b040617e46c0ba4fa7879459c SHA-256: d62246a2cb453b4cb51e0c57e2a30316f4c40809c5a15242955c2830703334aa
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' pointing to 30 external PDFs. The document body, though heavily obfuscated, contains text related to 'Breckenridge snow report' and the authoring application, suggesting a lure. The presence of external URIs and a high ML classification strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/123?utm_term=breckenridge+snow+report
    • https://godebisexizo.weebly.com/uploads/1/3/0/7/130775633/d0485cc.pdf
    • https://cdn.sqhk.co/remozemot/OhhgjVf/46128339902.pdf
    • http://rte-ita.fun/71402280162kurhq.pdf
    • https://karuxuli.weebly.com/uploads/1/3/4/3/134377251/0bd83df8df669.pdf
    • https://cdn.sqhk.co/tenotitur/gi42sgd/zupuritutanenopoxajug.pdf
    • https://cdn.sqhk.co/zadoweferoxe/bigjchi/steam_link_vs_chromecast.pdf
    • https://rifivubego.weebly.com/uploads/1/3/1/4/131407021/31f81dd.pdf
    • http://beamorem.com/awful_auntie_downloadi9c6g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fedufiporara/kelly_rowland_commander.pdf
    • https://s3.amazonaws.com/dozore/bhaigiri_film_song.pdf
    • https://s3.amazonaws.com/nijudow/68656772637.pdf
    • https://s3.amazonaws.com/gupojakami/pusutadowu.pdf
    • https://s3.amazonaws.com/rojalexipokadaz/miwopatonukefugamubez.pdf
    • https://s3.amazonaws.com/jipowumat/areeka_haq_information.pdf
    • https://s3.amazonaws.com/xeropizuwe/99679017362.pdf
    • https://s3.amazonaws.com/legesiliv/cascade_dafo_3._5_order_form.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db1c.bin
9a0c1001da929250bd8931778e87db57b23ee4a70a53b4dd92bdf8a279d125eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 5204 bytes
font_01_sfnt_off0000ed01.bin
4ea5d39094891a181e07c53aab4ab105a0fd8bb6f29713964fc2b52d83b6800a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED01 11268 bytes
font_02_sfnt_off00011389.bin
16d3f8655114d0902318f1a45715520560773d3bf5e390d74f207be828cb3ad7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11389 16260 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.