Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95679af004f989b…

MALICIOUS

PDF

80.1 KB Created: 2021-07-05 06:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5980b5ccdc690c42cfbe2a6fac5e948a SHA-1: 6f326e4574b84e541c9be657c57430d45e70107f SHA-256: c95679af004f989be6a8e96f6bfb33df02f15691eaeb141bceb46f9f178e6701
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The primary purpose appears to be luring victims to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://huntic.ru/uplcv?utm_term=what+is+it+called+when+a+solid+becomes+a+liquid PDF link annotation
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/dda960efa213051216e5a8f0272e8456/12252667930.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/duzovurakuxuvidojurag.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/bidul.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/betixol.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/98868493518.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/999c1qa8s1rvbe52cnb967uqk6/52899667969.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/894d6cb25884b0c3016e725525684486/segulaxag.pdfIn PDF document text
    • http://poorclarescork.ie/images/zijov.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/deef7d60d3bfe2646de2f267229d73ba/51663178998.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/cmljsav9pm1pv3mvpa30ot5iep/90268458134.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160adc898e9205---mixinotazojuluzisiwimu.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/6etpq4gb9e88on1aj49b9526m1/kupukofa.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/porguoqo0o9f1lmll517ubdkus/50498050701.pdfIn PDF document text
    • https://afayl.com/userfiles/file/zinuxoxamekoboleganedopu.pdfIn PDF document text
    • https://nevisnews.com/userfiles/38863800153.pdfIn PDF document text
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/62406202926.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f53ac7d164---75293381758.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/42b3925cd7e37d163a9ecfa1aad575ec/xulakuvolozesefitax.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0bdc75a1a---natebesop.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/75496fcb8d85814907038590a4a54663/vokuje.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/lafadi.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/f6fc8b309e2b05852d4bb2efc9f3a299/35759113370.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/bebawikalos.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/45385625321.pdfIn PDF document text
    • 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_off0000d885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD885 15880 bytes
SHA-256: b70abecdfa7d9e5ac1a6fafac493d451ce24cdc8be42d40b0eeda8fcf226db92
font_01_sfnt_off0001016b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016B 11000 bytes
SHA-256: 742f13dea5316e88db30c06184ec06f0c4653b96f04d923262bd4142e5225a1c
font_02_sfnt_off00011aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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