Malicious PDF — malware analysis report

Static analysis result for SHA-256 349c2875cc70750c…

MALICIOUS

PDF

105.9 KB Created: 2021-06-10 09:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 359f475f0235f41fe10c239c0753aac9 SHA-1: 3528bcd3bbe535a1d6319ae7346ccc7a7997b3fc SHA-256: 349c2875cc70750c8c0e835244e19e8439c0fb5d23ae3ab555568f3e1b1edede
156 Risk Score

Malware Insights

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

The PDF contains multiple links to compromised websites and a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to a movie title, likely serving as a lure to entice users to click on the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pistant.ru/uplcv?utm_term=akshay+kumar+padman+full+movie
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/c00ff05aef647ddbe822316302b87c84/nuwudawowafesogoligizapav.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c93ab905---23687667031.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdb64305cb---jisusumamifowi.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4b319c5ca---37507113768.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/34bd3f5ded71235fc0e5e9aff1fa5948/jufuzenipedu.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608662902f769---35420961476.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8566472e6---newufizobenutilir.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/f0ab488dd7bfbe5b5d2d9cebf63315fb/wejazimidujogesoku.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983f49c91ed---1730140625.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8b82cb149---48188884904.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/cd54387de6b04e4d11b98072d8733a53/51006363595.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/91289925bdc457a2f831633bd342e6c5/97996488548.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a58e2bbe0---17694220963.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b248a681466---19686681060.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://s292376414.onlinehome.fr/datas/imgmail/file/xedamusiwowowafutule.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b5f.bin
d82a3deedf911b561d49474c07ed180c1e712aac620043ccf4396b16d739cb4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5F 13112 bytes
font_01_sfnt_off0001469c.bin
c38850c4063d3b5c24dbec3321299f7e71e44a230aa20fc93a65c2786544cf5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1469C 5496 bytes
font_02_sfnt_off00015933.bin
b51bfd42d5882bfd6702b00f6b109398e1acf29c13b0654cc086fc2cea38b5ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x15933 12492 bytes
font_03_sfnt_off000182ea.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
pdf-font-stream PDF embedded font (sfnt) at offset 0x182EA 16164 bytes