Malicious PDF — malware analysis report

Static analysis result for SHA-256 44122f346a091ae2…

MALICIOUS

PDF

85.0 KB Created: 2021-06-26 09:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 841b7e415e5378b52d2261a440d3e62a SHA-1: be0c8c2e9eaf6089e9633b8e75469337a56e1150 SHA-256: 44122f346a091ae21f4dbbcb3379343b741552ceea0ebfa00afebfeb99b4299c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit users by directing them to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://catamma.ru/uplcv?utm_term=hendricus+g+loos+patents
    • http://atol-res.pl/uploads/file/xotinagexogujel.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/92b5b18cade0770212cfe3ca28759be0/94861938269.pdf
    • http://rowanfamilyreunion.com/clients/28915/File/wezomubiworenurazud.pdf
    • http://logiccpacma.com/ckfinder/userfiles/files/89315753231.pdf
    • http://lesen-und-schenken.de/userfiles/files/boponofaxegogutavinifa.pdf
    • http://jjmcp.jp/userfiles/Image/file/34613268631.pdf
    • https://cristalparkhotel.com/ckfinder/userfiles/files/33840459919.pdf
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/28458422262.pdf
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/ep4nf2f1qr1vocbasdsjqq0e82/43426314302.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3de4900d16---52479754134.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe8d2a144d---wutasag.pdf
    • http://cloverpark1959.com/clients/51168/File/20595834218.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b705cab5aa---takelafasagelokotubor.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/9643502929968b994b0e7fad8c4b7ce5/89167769368.pdf
    • http://misosmile.com/upload/editor/files/98997052110.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/n4729bic4dkn4puqh78s3uiaqa/48949195086.pdf
    • http://boschvietnam.vn/files/usersfiles/files/bozepegujemibet.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/d23ad7bf126e9a4f8af8ed279520df65/vexebe.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723be4df2a9---fisoxe.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4ceaa7ce3---beririt.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608de98caf798---54533292627.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/f6b16550212cac2d4dfad9365112560b/15140741235.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/hokr629j4epnt9b64mb6rteo06/buxomezomitesijotupofen.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e04c275937---lubitetebelefopus.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/02988d66b30d764f7e9989314bf34eed/96767348429.pdf
    • https://doanhnghiepvietnam.org/img_duhoc/files/mizotadagivut.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://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_off0000e759.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE759 16792 bytes
font_01_sfnt_off0000ff6b.bin
d2dee019a1388eef5cc2fa6ea1c36707e3a542f2b87567add2c6e01ac6cd1057		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6B 17652 bytes
font_02_sfnt_off00012e02.bin
a3a4f28f4d1b2b5f97e7f6b8b6a2821d23fa8bb81a40667f8891703c8e52b453		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E02 10780 bytes

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