Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd1083e9a96e094…

MALICIOUS

PDF

81.1 KB Created: 2021-06-26 15:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 557b73769a37c14456648c6f9804f11b SHA-1: d3cf97ca1b3bf275eb3732dd1363899fe05f3329 SHA-256: 2bd1083e9a96e094df3e4c419bbfca28083d9bca151ab536b31728cea1673744
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further compromise. No scripts were extracted, but the structure and URL analysis are sufficient for a high-confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/4k5cdkmc8pds8fagcv47i5agpc/92626821411.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a61b6848064---pidaweladilusumunuret.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/22af9cbd7363032db194498aab2fc728/32387314075.pdf
    • http://al-bandak.com/userfiles/file/33678294170.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53327d78ca---belogefarurepuvu.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/145caa3e7e15b43d22e8c1b7a692a40d/32766299081.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/djttaup549kh12581ag8botmvc/betiwabivebazojobot.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9523a1ded6---pasagomapinugo.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cae256bffae---72161290539.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/0ebe979cda0297eafb725112fb946829/22417592435.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/3b0u380j7do6r0uk5d2o1jgq79/fiperafolujaxose.pdf
    • https://fleschimmo.lu/userfiles/files/68494555222.pdf
    • http://vanharteyoga.nl/uploads/files/55724690122.pdf
    • http://goref.ru/files/file/seduxifedozawosodugikajig.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/0h3r1qke0nr06cgqaht6har6tr/tabukipakewemupolivu.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/bc6aeee37b3163f15a6a00963d2424b5/rowesakarifuwuxaw.pdf
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/faxoputezogumobipadedekuv.pdf
    • https://koncnc.com/genelresimler/file/39764539278.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d380972c49---tazeboxobaxiniwukaguw.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7ec0587a5---musuzamalazov.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/te8m4a2ajb7v0bbm7gocg1b4d5/75208894143.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8be702f38c---gukitemanivesemegupu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+do+the+dougie+step+by+step+tutorial
    • 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_off0000d7ba.bin
7b44a34d51f90cf2e8584d18920cb651b1954560812e789d801fa785918c404f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BA 10996 bytes
font_01_sfnt_off0000f100.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 16792 bytes
font_02_sfnt_off00010912.bin
983707d5f5fa3ce6197ff77546b33e11784ba7b983d507b1a9a920dc57588ffb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10912 17600 bytes