Malicious PDF — malware analysis report

Static analysis result for SHA-256 baefe57094d6f739…

MALICIOUS

PDF

87.1 KB Created: 2021-07-04 01:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: db6917bef36409a8956d680a78ac8c15 SHA-1: 42a23ed6647bc50905db7a47cf33d0b17d6f1d4c SHA-256: baefe57094d6f7398813217e01a585d33cbfbac8d8c6475f44c18ad5d4216cfe
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised CMS uploads and disposable hosting domains, a common tactic for distributing malicious content or conducting phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://bfr-bialapodlaska.pl/userfiles/file/12905454829.pdf
    • http://dlt-nkp.com/fileupload//file/37070907035.pdf
    • http://slbreakingnews.com/ckfinder/userfiles/files/80316703249.pdf
    • http://pantryscan.com/123cars/imagefck/file/88240540292.pdf
    • http://lungshingcentre.com/userfiles/75451541957.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/1cf44a3c136199369658cb678fe6e5ec/96621393000.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/17472093686.pdf
    • https://tectrongim.com/uploads/files/dulupemigimu.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/0597ce15732031544304589578aeb257/95611495963.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087668d7659c---vunikupevibowadowipidap.pdf
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/livor.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8aa2219c9---13401969529.pdf
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/cd5b96eeebb60cb95b2fa941dd0330b9/46023113027.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086fe9b0bd9c---tiwamatavazox.pdf
    • https://yodobashi-church.com/lunivulose.pdf
    • https://pasarantogel2.com/contents//files/10564688969.pdf
    • https://cottonweb.net/userfiles/file/10838360699.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/918a91760e3d7bde9ba7120c8a46e7c5/vinexugalus.pdf
    • http://nelly-design.ru/upload/files/43213521387.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/j6tnt1fjqim2e3saqc0pb7gp6i/bowesalu.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/2608b40ac72264dcd65673d56f396790/wubiwasuzipu.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/efv2fi5qgh3kogb2irrsgvi0s1/2324623351.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=5th+class+spelling+list
    • 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_off0000f34f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF34F 16792 bytes
font_01_sfnt_off00010b66.bin
28ad4c4f544f9dd43df1792c8bf727bbdf9dfaa7a08b60472fb76624b5ce4efc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B66 10472 bytes
font_02_sfnt_off00012324.bin
ad08c35d73a7686d1667deeda725301461822a9e9f32a104788137f851f1f187
pdf-font-stream PDF embedded font (sfnt) at offset 0x12324 17016 bytes