Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dad2f226284164e…

MALICIOUS

PDF

88.4 KB Created: 2021-09-04 03:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ee63c016caf15f6d61515e11c6e48dfc SHA-1: bee9def94c783cffcc93a37ebd7c6c0a76c060e9 SHA-256: 6dad2f226284164e3cbeb8d4968914a650ef1d458f99e13902419f984f33ddeb
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of external URIs and compromised CMS upload links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://drafthe.ru/uplcv?utm_term=see+yourself+as+god+sees+you+pdf PDF link annotation
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d01e1945d55---lubimi.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/58807898680.pdfIn PDF document text
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/xazuxodanegakidi.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/xofimi.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/51318966621.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7332787f07---sakutasojevo.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc0dbd116e---silutejelafi.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/jokelorapagalarulusu.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84d293dbd6---levuwefatafubifotesuwo.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/1d4c9eef471148f1673ad4cf201d957f/68043730706.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/92542851507.pdfIn PDF document text
    • http://jaatkinson.com/userimages/jawalozazudokajabirope.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607395f01288f---52366046976.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/40212042382.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1606d44f9af24e---nafalakisudaleg.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/sesux.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de4fcedcc27---diduzajonedujibogi.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1cc2d5467---juxut.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/90660399506.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091f4d2f0d6f---fulagawekasibeg.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/90633047659.pdfIn PDF document text
    • https://yodobashi-church.com/kobesofifegapaw.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210608_05F01BD9409FA613.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_off0000f047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 19544 bytes
SHA-256: 2d8b8303ca1f3d69a8e2cfb527dfd05ab62da102fba16c4aa21acfab2b16ecf9
font_01_sfnt_off00012358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12358 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6F 10668 bytes
SHA-256: c4c7dac6daa67736f30410a53c18a0802eb8a367eca27a430c1050ad0d223152

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