Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ae266168f7689d…

MALICIOUS

PDF

93.9 KB Created: 2021-07-16 03:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 67a5a235358b4aac343f60c6850b9a3f SHA-1: 23e6aa9fb34d291a922be7435b3a495aa54e2b0e SHA-256: 06ae266168f7689d4a0c49e959be4e7fed9de060075c4961c991a1198b702550
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or appear to be disposable hosting. The PDF structure itself is identified as a link farm, suggesting its primary purpose is to redirect users to external sites for malicious activities such as phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://oniceh.ru/uplcv?utm_term=physical+and+data+link+layer PDF link annotation
    • http://www.asslar.de/downloads/93829119506.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/dobokuxofos.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/83393645818.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/77751434533.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87e0bc8574---22094024086.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/fda44d2d4f7121751fbdb253644af6ce/jomatipiluvutokevava.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087913add5aa---lofefamo.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/qgrg2h9nrl40dg29sjh5ncuc61/18028602616.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/63530e6125c845b65b9298089f93e97b/60371821060.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/14b1ad7339c5238716f56ba7bb09bee0/1254250263.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b03584732c9---25120588901.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb333cdb61---8973561125.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/26957819711.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/1c9bbbe0978b74839aa1374426dc38c7/fapidumage.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/94818901102.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/33455614706.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/totizilenabifuxon.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/6a4075de8317b08e4a407919ee38442e/bonejazekotiz.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/61823292882.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/98037091829.pdfIn PDF document text
    • https://sca-kc.org/scauserfiles/files/litosixikoveper.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/be42418c07cfa6a0d1a98596af4001f9/92693211672.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE8 17232 bytes
SHA-256: e8cda47a6d7124e242897f2abfc48fc85958c9b5d96c8991365db45dd2a056ff
font_01_sfnt_off00013a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A80 10556 bytes
SHA-256: d4b4606c171351626157d32270ffd365db5fe2b88d0c3580b42e02672936abef
font_02_sfnt_off00015289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15289 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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