Malicious PDF — malware analysis report

Static analysis result for SHA-256 32cd487a5a506172…

MALICIOUS

PDF

78.5 KB Created: 2021-06-27 01:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 71705e3a4f8c7a5bbccaa10cdc0225d7 SHA-1: 6e2be87bdbacb6fd95df6aa3dda0b7c04bd2c062 SHA-256: 32cd487a5a506172546ae3afab539dfb46c865559617c3fa6871c37e5281a132
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The presence of these links suggests an attempt to direct users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://www.prieteniitehnicii.ro/documente/file/tibolujilefatabowam.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/d91146e680fe071985c867a18986b2cf/85036071797.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/a99d74e26acdd691d87ab79fa4a0b346/jonovesurabob.pdf
    • https://muratay.nl/userfiles/file/29040946970.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160946604e5371---jizojusemuwuvumuwuxatukud.pdf
    • https://pjkconstruction.ca/images/file/79372800252.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/29t8n51mrjriuvo0h52rptpbm1/21457024357.pdf
    • http://studiospazioambiente.it/userfiles/files/70103916786.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/58a042379e34e42d329814b8bde9af37/kizorixuwivazine.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/7kl966r0rup02mo8ot2fuqmlhq/giwexajotu.pdf
    • http://amoy-art.com/Upload/file/33248630661.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/fbfbf760ade2d9c699217b8f52a6446c/fovigefifuvokanotefa.pdf
    • http://magooferta.pl/uploads/fck/file/25303131997.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961ccd15048---62464386600.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099cf9abf421---18054282560.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-5-16/20210516200344720863.pdf
    • https://marigabung.com/contents//files/1036022811.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/87bq11940pe06e9a1qm32bh538/wosidurazusaref.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/1a60e8d0b9219993dd0b8d3bbfe55204/84092532469.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/0c8e686a105200fce27a18edf0554aa2/83166536398.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d5ed88fda---80468188719.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=point+by+point+example
    • 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_off0000d1bb.bin
632d85a70bff9f398f9bcbb8e930a4415baef943726b535ae22ebc9c5856cef0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BB 10500 bytes
font_01_sfnt_off0000e967.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 16792 bytes
font_02_sfnt_off00010179.bin
678cd094f20dba205be102d2b57b1c72df171cc732976c6189778f4e54588c3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 17064 bytes