Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceea24a2c8b229e1…

MALICIOUS

PDF

84.5 KB Created: 2021-07-20 15:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4bc4bb7af18ea08e98b20be6ba1a079b SHA-1: def5ae25ad1c9e62c23cf51de2c3402eeac579fd SHA-256: ceea24a2c8b229e186035019e9a7700841ebbbb9384e2d45959e8893ded2d471
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/chiv95km6evbh0ei7su4c6rchf/safev.pdf
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/tifidosomipijab.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609556b68f5a1---tuvofudogazinusiwemepeva.pdf
    • http://abnicum.ru/files/file/31845138530.pdf
    • http://rayanchem.com/d/files/71137597160.pdf
    • https://srmhomes.com/images/bulk_images/files/xelusuzalemukeguvutobo.pdf
    • http://solyaris.pro/admin/ckfinder/userfiles/files/5972529238.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b0c1e723d---3440827828.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b759118d6---fomalitemoruzera.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/0fimo06eg4m9bt3sg4b1ggnii2/titaga.pdf
    • http://amy-tsai.com/images_express/userfiles/files/93500990436.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/ded5b40098319d67277cdc95aa6726f7/falimagolirikerenokaguvef.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dd8b3536a---80606260710.pdf
    • https://clifestyle.net/uploades/userfiles/file/sodugez.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608175c1bc8e4---22031689993.pdf
    • http://amy-tsai.com/images_express/userfiles/files/52049061618.pdf
    • http://computergramm.com/userfiles/file/58164629584.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/zukafisegazoz.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/9830153b0982694b3d0504de276c214f/gozowozo.pdf
    • http://kco.su/userfiles/file/45838770098.pdf
    • http://mpu-beratung-brendle.de/userfiles/file/43949932902.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=either+neither+both+all+none+exercises
    • 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_off0000e6ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CA 16792 bytes
font_01_sfnt_off0000fee1.bin
b2fb6fa73dbf4780431f27dd45e7dcf7c431ffece7406a9e72dc1e0219e5427f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE1 10552 bytes
font_02_sfnt_off000116e3.bin
fc83a52d6ac297996b149532d6e3073823104107b0c9cc7f04d92341576fe2cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x116E3 16936 bytes