PDF malware analysis — malicious · 7c8127d81d417502

MALICIOUS

PDF

76.9 KB Created: 2021-06-28 17:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: dc14dfb06917465f80fea3c69023a885 SHA-1: 49532e0d7ba3bdd4d22b69e58fbef1fb9f1b7e2d SHA-256: 7c8127d81d4175028e9e85e5e1f5c272e2a7698d2f0c8647cd391bda1fdae6c6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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 http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa692365b7---36002988562.pdf In PDF document text
- https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7a1ddbd60---kugiwujosojonemomaku.pdfIn PDF document text
- http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed3eb81bea---1376543116.pdfIn PDF document text
- https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/665917f0a7b92e72c6c40128a281c52d/20653298290.pdfIn PDF document text
- https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/de921a2ba126b9ad71ba620751644f80/timejimabifukufedivep.pdfIn PDF document text
- https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/5125375c380c290799b06749fff4e155/noreditisatoname.pdfIn PDF document text
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ddb4613fd6---fetujeduguwodigo.pdfIn PDF document text
- http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160784085ed13f---puvodewali.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/keqihv0vs9tid8ob4vnh1q0kc5/kinuvibazogew.pdfIn PDF document text
- http://artospace.com/pics/file/jitetij.pdfIn PDF document text
- http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/uapc9prk6vu8mc85ajlhfnvlku/tujurusuzalabazeluxeboju.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5fd3087f3---66536677868.pdfIn PDF document text
- http://3e-machinery.ru/app/webroot/filesfiles/mifewetejilu.pdfIn PDF document text
- https://dolmalatrek.com/userfiles/file/49826027442.pdfIn PDF document text
- https://ladangmimpi.com/contents//files/mijofavupokosenalovo.pdfIn PDF document text
- http://e-kva.ru/admin/ckfinder/userfiles/files/juzekuzoponadugapatex.pdfIn PDF document text
- http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/13339715810.pdfIn PDF document text
- https://cambodiadriverservice.com/userfiles/file/babinejaxazidedokak.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/hjqrg96sfcnshein7mlhuko7u5/93274811087.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb39c8b4dd---42827812081.pdfIn PDF document text
- https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ecbbd5dae2---wuxexen.pdfIn PDF document text
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608266e00ae16---lemaduworefanolakep.pdfIn PDF document text
- https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/6a0tav033oipti9jklmtsni5g9/2452219424.pdfIn PDF document text
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/453a1ac157930aad0f25562cd246b752/62429269799.pdfIn PDF document text
- http://andrelandberg.com/userfiles/file/napakupufejenaxajosibozi.pdfIn PDF document text
- https://alihuata.com/userfiles/file/46894736395.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=guys+jacking+off+outsidePDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cab2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAB2	16420 bytes
SHA-256: `df43a26e249c11c664ecfc1ce9c623d2d42b0dcfe6d429bde426b3db1cd3f5f5`
`font_01_sfnt_off0000f4c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4C9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010ce0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CE0	10980 bytes
SHA-256: `edaae251a82ee36bb6985c431c8a92baf4b86a79c2455dce05ffea6f05c82ecb`

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