Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d81417e63a4736…

MALICIOUS

PDF

84.8 KB Created: 2021-06-29 00:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53d9081f67df9f00cfc2bb29425591b0 SHA-1: f6cb170898ee909aff6be4fb4634f51bf05be8fc SHA-256: 06d81417e63a473675ca8766a96e0ab4ad513f0bb0d883df037ee7e5d9b8602a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, indicate a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aydin-elektrik.com/resimler/files/werebulugonetopafigolot.pdf
    • http://ackerviewguesthouse.com/userfiles/file/74216747852.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16085b10372a0f---58653073950.pdf
    • https://autotrans911.com/thread/admin/uploads/file/volapuve.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/980a5874b8d5c40409e76df649ea234b/49727889862.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/f48c486ebca989284bab0555a4e8f9ce/36094694160.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cfd21b2ff---54637606681.pdf
    • https://ratsimae.ee/media/contents/file/35188725895.pdf
    • http://vce34.ru/attachments/file/javumezenuziwuj.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dcd7ed298---12403074320.pdf
    • http://dgjst.com/upfile/file/77716668859.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730866de28c---zeboxovelu.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/93c9e5a45b6dcfe3d08be845cd246030/71359324181.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c5966cbb9a5---93337906662.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ddc21a2ef5---29611007619.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/f5a377e40932947f2b9333fd6cb217ae/76847809983.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/475173201f59efbd63ad839405cedd4e/79478633485.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2851358d6---67844930816.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4a5c24cf8---8992748307.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b99db57276c---nurufewogisenipope.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c11df651554---80463821229.pdf
    • http://chronocertif.com/userfiles/file/tedazediludoxewakasogis.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718f64e2d18---30825422566.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/u79bsc080548fjogi4oa22kjmi/badupixelobebezumo.pdf
    • http://jp-cable.com/d/files/wajewaleta.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/da996e4medd4804jbgpu7gr506/pezikut.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=adjectives+beginning+with+o
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/b9140614a0ae9ecac3852e557039cf1d/63309262965.pdf
    • 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_off0000eb44.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 16792 bytes
font_01_sfnt_off0001035b.bin
0ae03ab7ff38ae97754a58b28cf8c8f04b087562ee4dce063f75485f827ab2d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 10744 bytes
font_02_sfnt_off00011bcf.bin
24c3747d1fd4b2e3b3cb4d573a323c4cd18110ef32f2c255fc32b5b5fd5fae7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCF 16208 bytes

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