Malicious PDF — malware analysis report

Static analysis result for SHA-256 073bde597b42e056…

MALICIOUS

PDF

89.9 KB Created: 2021-07-06 00:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5ae36a193e64d7fcc242d67b9fd53e9 SHA-1: d2ee5d91c87007e2086073082c9ede3652a62a50 SHA-256: 073bde597b42e056b063719a2c41c32e8d1f3157da64ffa8d2bbe770d1506926
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/688d3d9dc59e861f5341d3ec85f6bbb8/zukisixebak.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d0406f5e0---zuvigofajefisunagume.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f8e4ae230---99442950450.pdf
    • https://kermoulin.com/userfiles/file/vujusumanevi.pdf
    • http://capmar.eu/userfiles/file/76328465314.pdf
    • http://global-insurance-broker.de/downloads/88345415195.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/gewafunonolaxifawa.pdf
    • http://teraval.cz/res/file/bawazigirer.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/0c49afe5d844a3dc91798a745fb1bd95/fujigatu.pdf
    • http://maekuangudomthara.com/ckfinder/userfiles/files/89196431622.pdf
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/7dbcb6427b30d3f8fa41cb1035b5b3bb/59421676912.pdf
    • http://ajtoablakcentrum.com/_user/file/58258924691.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abda35c2cec---metofivobefuxaxe.pdf
    • http://aitrans.cn/UploadFile/file/F1202106060354217780.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/d732cd1897aa3a4c06f3fb5c420926f1/rufoso.pdf
    • http://aliglobshop.com/userfiles/file/68446777276.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/0ab0f02c33e670ff9bb177b963f52914/39657932689.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aa9ba7d26e78ac5afbf93eaed36d5e9f/vifunowo.pdf
    • http://erbaytag.com/resimler/files/mirowubal.pdf
    • http://pcccphucvinh.com/upload/files/80703714777.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607f30ea761f9---lajusirixatava.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=empires+and+puzzles+mystery+hero
    • 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://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_off0000fb56.bin
6bc720a69b539a10d8221736f753e70b49a653729baf71e7e5abf64b61fe8493
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB56 17664 bytes
font_01_sfnt_off000129ae.bin
42c10d52de7c5de775925b3a39765b67893587555426e85430145e4395a0ac7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x129AE 10912 bytes
font_02_sfnt_off000142c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x142C9 16792 bytes