Malicious PDF — malware analysis report

Static analysis result for SHA-256 606ac9f23705e98d…

MALICIOUS

PDF

88.3 KB Created: 2021-09-05 12:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: deffa35fa4837032b0c45c5d8b162c85 SHA-1: baa2c2c81eca163292dea8101812c8a00fd1b487 SHA-256: 606ac9f23705e98dcc72dc012349e610e8f150621fc88c9dc7d46256dc8a6337
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. While no scripts were directly extracted, the nature of the links and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/6de02f26258de831692257f6b2d0fea4/zibulebuve.pdf In PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/veloxoku.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/tawadufekugibawajamedavel.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/u0g2cejmnq30v8uhldbtcu54i2/38989433776.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/xuguzevigolonaxasepozu.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/62301646330.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1559145e59---xiwoxapunevagu.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/mifodafoti.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/zifipiv.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/8ba42852683569465defd82011c6ea4d/kaxodukuli.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608743780b0dc---fakimokufiruruxonipota.pdfIn PDF document text
    • https://termofriz.rs//files/83319839692.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/qbo73l2fgmu9o88k50k8bpged2/wawurevoxonawi.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/2ln295gmpmkavhlnb8s8col552/51608324104.pdfIn PDF document text
    • https://0900107678.com/upload/file/78949145037.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/62047729611.pdfIn PDF document text
    • https://oreopay58.com/ckfinder/userfiles/files/nidusenidu.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609856548b199---81228771465.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/hlgai59sgqc1atcm0rp8k3s7d1/fowodotataxefobuvukuwazal.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/badilujusidip.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/25167991935.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/nelitomapifuforemu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=fractal+design+node+304+manualPDF 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_off0000f0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D4 18696 bytes
SHA-256: c36c1f066886d2b9b68e15d7d4187fea88e9c4246aa29fde4586b20b1ba9e461
font_01_sfnt_off000121e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E8 11164 bytes
SHA-256: 012f144a7b64274e474e55602f72fe53d8d7f26b25671037dbb286fb545022aa
font_02_sfnt_off00013bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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