PDF malware analysis — malicious · 2d7be908d9929388

MALICIOUS

PDF

75.8 KB Created: 2021-09-14 01:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: ea541b22e38982c5cb4521532ed1b68b SHA-1: 49b6a0db0af080940a928c29ca5b736ee3312007 SHA-256: 2d7be908d992938895e7eb2f0766f530f7cf4e4ae63d07a140f778f2a5420946

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm and a callback phishing lure. Although no scripts were extracted, the PDF structure and embedded URLs suggest it's designed to direct users to malicious sites or engage them in a scam. The presence of multiple links to potentially compromised CMS upload directories further supports a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

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 https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/3a236ae803a67141409c9c2aa68ce9bf/lelejigesidaripabipur.pdf In PDF document text
- http://jorkurojus.com/userfiles/file/5303175512.pdfIn PDF document text
- http://cartopack.be/Images/file/10432531591.pdfIn PDF document text
- http://bjqyms.com/filespath/files/20210907152829.pdfIn PDF document text
- https://merlak.ru/userfiles/file/kobasipote.pdfIn PDF document text
- http://moscowprice.com/content/xuploadimages/file/ledalerisa.pdfIn PDF document text
- https://imagebuzz.net/ckfinder/userfiles/files/3096228582.pdfIn PDF document text
- http://devison-matras.com/upload/file/dinokifulov.pdfIn PDF document text
- https://ofly.om-digitalsolutions.cn/upload/files/lizapav.pdfIn PDF document text
- http://tubietelbar.hu/uploadfile/jidazuni.pdfIn PDF document text
- https://www.uflo.edu.ar/ckfinder/archivos/documentos/89562320468.pdfIn PDF document text
- http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///gurukimobowesofukefobopo.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccf0a5ab0b---1512864448.pdfIn PDF document text
- http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161307e3631c1e---12826529964.pdfIn PDF document text
- http://opusincertum.it/userfiles/files/42362115735.pdfIn PDF document text
- https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613828724bddc---5568763058.pdfIn PDF document text
- http://urduhadith.org/survey/userfiles/files/dujedumegesomeveg.pdfIn PDF document text
- http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/68kej1nbtkbijj56014mr723rj/taviralevoxekajede.pdfIn PDF document text
- http://konberdbio.com/upload/files/tezufibujafawobuxarijopu.pdfIn PDF document text
- https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8edf4df833dd1bd6af3568cf605fc786/39481138107.pdfIn PDF document text
- http://trufeel.com/ckeditor/ckfinder/uploadfile/files/39289363429.pdfIn PDF document text
- https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/nimokuxawoluvagosufuwolid.pdfIn PDF document text
- http://compow.net/ckfinder/userfiles/files/konozixusubazi.pdfIn PDF document text
- http://www.masozilina.sk/ckfinder/userfiles/files/logozitasavipep.pdfIn PDF document text
- http://westhollywood.ilovepokebar.com/uploads/files/36262235678.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=heart+text+art+copy+paste+iphonePDF 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_off0000c028.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC028	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d83a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD83A	17844 bytes
SHA-256: `b5d7e135c4c1d40e1fef16ae819cd92874e1665b4ede670e396901a4c35686fe`
`font_02_sfnt_off00010756.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10756	10632 bytes
SHA-256: `4dc2013d6582139859258a6f8b456e7b0788a50ed3e880f6b3d30eb116e399f9`

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