Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf748d226f7bff6…

MALICIOUS

PDF

88.9 KB Created: 2021-06-25 19:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d055e2327d2136f477255ac218ea5062 SHA-1: d1dab80d14b563fd48eb62b6e1c56f0e7e009867 SHA-256: 3cf748d226f7bff6841aed49e65a7364dc56db192821ea6846d03c5ba3eaf158
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scam operations. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/56481b4f22333647a4ed719c8c9cd8d3/jugepanulaga.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985c49b9614---61076372301.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/fb309df5d3dfa980f3cbbf105d2905ff/35112852100.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2aaca4223ff228a087594bb0e538501d/64400514978.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/babo9ji5ld66u2irdmbsidvvus/47047775500.pdf
    • http://turinhotelcompany.com/userfiles/files/pepizuxav.pdf
    • http://infrabud.eu/fckpliki/file/57931424924.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0966883677---77502782980.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/11566be05f2d6cdb89bb3cca3df97cda/65207717018.pdf
    • http://xboxheerlen.nl/userfiles/file/tezazatazitaliwotu.pdf
    • http://angarakshaksecurity.com/userfiles/file/15336510435.pdf
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/piseji.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/0a828e02d55f990a37f33a2718b8bf7a/soxatofidadebegipezenupi.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/3de439d73608975c5798938933e2bbdd/77151645031.pdf
    • http://lacasedescaraibes.fr/file/74775714925.pdf
    • http://goldenpeak.it/userfiles/files/vejuwugagikok.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/e1c45f7a8faba2847b0e308f826eef39/47308163452.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16072664d38791---76533053082.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ram4r0kk3vuivltq7c5n36mbcb/xuzategabo.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f64010a1cc---fuvitetebokiworavi.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16071912f3574b---femuli.pdf
    • https://yingzhaoliuart.com/upload/file/32155705338.pdf
    • http://bright-inter.com/file_media/file_image/file/zodapoxurujuvonu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+open+pdf+without+password
    • 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_off0000f388.bin
d40dc1b8393cd7d0a25c2b2bbc75a94fbcfef7cbdb354f0ba4339e909253264a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF388 10724 bytes
font_01_sfnt_off00010c27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C27 16792 bytes
font_02_sfnt_off00012439.bin
199132159d5ce8b1f6352c2bd1399354905b6f069b31099a018e4728a9f6ffa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12439 19512 bytes