Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f93b75b6e6808d…

MALICIOUS

PDF

84.8 KB Created: 2021-06-27 05:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7d4dd856fec64ce56d4da33d6264e958 SHA-1: bcddbd1fc54623b17a06cff77f8068a97db327bd SHA-256: 30f93b75b6e6808d4717779c8b94bdabc3fec72fac996cd949b0fbc14e788918
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress upload directories and disposable hosting sites. These links likely serve as lures for phishing or to distribute further malware payloads.

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://cafesca.mx/ckfinder/userfiles/files/fimezutem.pdf In PDF document text
    • http://scpt.it/userfiles/files/nezofaludelofelo.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/ss34q84roe7sse0g782id02sos/29435582242.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/biguvukosaf.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098336872aff---kirurupakanenarovifovizo.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a5d5dfcb2---mupewosu.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/14962668419.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/toligudegadisabavime.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/4742282378a971e1c9e2c4c20639eb01/27967241133.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/35680214915.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/jie16jotmrbau9tab7vt9k4l3q/zatulewumovovagibezabik.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607af192c4c3e---47659694885.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/24c2dacd489c4feb81cb976fa58c0f00/83981420272.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/52036756409.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/6cdtfp20fkj5q657sdk7n4f1r9/51090747289.pdfIn PDF document text
    • https://ivaco.it/file/nunetovojufedabadurozifan.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/83e593e6b1081a5746f0167c9740b17e/24429891998.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089fc6227d49---rotimajoz.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/976221fd2af77390e1e0816a6969ad4f/88418292163.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/34134614427.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/fegizutexiwutirirav.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/0v9ju5lt8oa7vpd0u5bo5ueqq1/68891961900.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/naxilafonepuxot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=take+for+every+penny+crosswordPDF link annotation
    • 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_off0000e614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 10696 bytes
SHA-256: 094acc9c8165a98a2ced3ac77d3253e70e72e89366c23e40d46bcd6ff75740e1
font_01_sfnt_off0000fedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F1 17452 bytes
SHA-256: e7d44fc3b3ccfdcd5fb72f12328fc87e7fe832e837ec38ba3ec9a8c554c08dea

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