Malicious PDF — malware analysis report

Static analysis result for SHA-256 df002df01b3f121f…

MALICIOUS

PDF

81.2 KB Created: 2021-09-12 14:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a439f8dc11624ffe84c7114de2fb9049 SHA-1: d3527a0621a32db90f998f4a17ecde47f10d9b5e SHA-256: df002df01b3f121f15fa5e6e7d87179a41453eadae3a5dd2976718d98601950f
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised or disposable hosting domains, suggesting an attempt to distribute malicious content or phish for information. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://turinimoti.com/assets/userfiles/file/88024378318.pdf In PDF document text
    • http://sambometal.com/dataroom/file/40521805857.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/59210451197.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/gigijoforamitapav.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/21006923411.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/gerofevin.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/q3uos1f2vp2dqnhffpsunvpmk4/84295862694.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021090511040170554.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613364e218524---79019779015.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6faf72bc0---mibupevepetowu.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/85387572317.pdfIn PDF document text
    • http://phamtrangia.com/upload/files/62447026531.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/safitorunajodurunegadi.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/tagif.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1631402540.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/8706525909.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021090406275692.pdfIn PDF document text
    • https://photopoligrafic.ru/ckfinder/userfiles/files/37462770169.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/zonikujodijolugawebivobe.pdfIn PDF document text
    • https://westhygiene.hu/editor_up/fusutematarimanewirosixud.pdfIn PDF document text
    • http://camdohungdung.com/upload/files/70490122079.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/95702451933.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=bike+mayhem+full+version+apkPDF 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_off0000d812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD812 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF029 10948 bytes
SHA-256: 87c1d2586c21d13d81b6ed5e3ec5485458d32957a00208fa5194fd5de958c0b9
font_02_sfnt_off00010959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10959 17512 bytes
SHA-256: 4cdca356c2979d6a40adb549f68f83d39ebec7daa61f18d5fe8499092e6656b5

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