Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d06291dbc7bd307…

MALICIOUS

PDF

95.3 KB Created: 2021-08-10 22:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3d892ac494b1207f0ea03318c50a0a18 SHA-1: 10458b9117b5943d5c81e3c0cdc33c330021b241 SHA-256: 2d06291dbc7bd3077442288f3ff3b3e200aae3534f069aa354dcb20c0511dae0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many hosted on potentially compromised or disposable domains. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with a SE_CALLBACK_LURE finding, suggests a phishing or scamming operation designed to trick users into visiting malicious sites or potentially engaging with fraudulent phone calls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://ketchas.ru/uplcv?utm_term=moto+x3m+2+unblocked+games+77 PDF link annotation
    • http://alituncer.com/userfiles/file/karazanoferafelufawej.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d51a25c6b4---37407446269.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/45544816795.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/20462213164.pdfIn PDF document text
    • https://ctyhoanongangiang.com/userfiles/file/toraromidu.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/xurozokexikaweluwijib.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/40195962212.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/f777efeed26ed4083392184857dd9a64/wusonifujisoso.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607798c0cf437---sililo.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/xekiridafafodunob.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/wofijara.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/tutuxiselil.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/80903403262.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c981db0da2f---29849126620.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/tulezezoxijosaguruxiwad.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/0d047f3ec69f1e8bbe53eb0cd464d368/79570130012.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/ludoxu.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/wegimewagizifitomufozo.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/81898823359.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d9fcd02d1---wurijil.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99ead5de29---losexuxoxe.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/48182439230.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/mgfk8qend2uh83307t1f6ludha/xibobagevumutoga.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/svmddaqg824d56ehk371tgeg80/9551693147.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/64823971932.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_off00010e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12649 11288 bytes
SHA-256: e3e99972898fbfb3b35a66bae88afb994ca117e996b8225dbc51c079d5546021
font_02_sfnt_off000140c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C9 18528 bytes
SHA-256: d9cb00c2832e7b121527ab8001fdc0b9720c8b89704c5f54b537d510ab4743ba

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