Malicious PDF — malware analysis report

Static analysis result for SHA-256 7376bf5f38ea34ca…

MALICIOUS

PDF

67.5 KB Created: 2021-10-03 13:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6b143b41a6eaf96d4561fe92da7d3d4d SHA-1: fdb354c3812547798c302a1c32e7cb8a84bb236d SHA-256: 7376bf5f38ea34ca1c2b415c6fa897b6736c5a2fce933c861f774ce71dd2b7c0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-based design with a clickable action, directing users to external URLs hosted on compromised CMS platforms and disposable domains. The heuristics indicate a link farm strategy, suggesting the primary goal is to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://www.c-l-r-p.com/admin/ckfinder/userfiles/files/vufubogarime.pdf In PDF document text
    • https://mangonebike.com/uploads/file/gatesawopanifivopil.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/sosezozitakef.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/f9a1a0616b12509b18d2fda59c6aa3a2/28355699272.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/68142348627.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614b8e2c754c9---kawadezozin.pdfIn PDF document text
    • http://chinastom.ru/userfiles/file/jezokan.pdfIn PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/busipaxozobuni.pdfIn PDF document text
    • https://mandaljeebanking.in/ckfinder/userfiles/files/saxaxoxorefarakivuz.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/73574020259.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/17336212037.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/35765603711.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210923032726.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/78342015193.pdfIn PDF document text
    • http://konberdbio.com/upload/files/rajizejubimejegotokugo.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/12105536695.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/96594161242.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/87253731260.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/11989518854.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614163c23c411---kelujajadabu.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20211003_7C056AA72FC4F5A7.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/61924374588.pdfIn PDF document text
    • http://kleiberit.ru/files/file/96717711167.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=renneting+of+milkPDF 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.

FilenameKindSourceSize
font_00_sfnt_off0000ad9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD9E 10264 bytes
SHA-256: 3bc8858b527193f5c32af7adda1ee2e0390af92b3b9546f4acc5f13507b83d87
font_01_sfnt_off0000c4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AC 14496 bytes
SHA-256: d323ab62676fee8a33fc125cb20dc9b9354a33f35c2899305a5d0f7a0058ee99
font_02_sfnt_off0000e8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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