Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cec02dc835a32f9…

MALICIOUS

PDF

70.7 KB Created: 2021-09-26 07:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 003de1f62b58bb249eaebfb065bd168f SHA-1: 82aeb400cceeb0535b8052845c8cf74891a97a6f SHA-256: 9cec02dc835a32f91f7edbbac75ae386e80fac6825d1f07c90141979add0abe9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and external link behavior are consistent with common phishing techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://biosite.ru/images/news/file/12525982565.pdf In PDF document text
    • http://beta-rc.com/upload/files/xisowip.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/bawabipedonef.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109201151014268.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/pisileta.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/punukav.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/6ghf37n9pfe2to50ru2n261ktp/65223760470.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/bipatibopazum.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/5545522967.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/83275370217.pdfIn PDF document text
    • http://dip.natura2000.pl/imgturysta/files/94498620006.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/jejasekipoxuduma.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/guwumovipodujamaj.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/mitazokiw.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/80808638598.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109111600541642.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/duxesawefezotutawuw.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/44781217440.pdfIn PDF document text
    • https://legacytwirlers.cornerfamily.com/userfiles/files/sunijuwepazitubemo.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87870911255.pdfIn PDF document text
    • http://rurisnet.org/images/file/32922827365.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/vaxexelokaxofabalitofakaw.pdfIn PDF document text
    • http://queenart.kr/userData/board/file/jidewizivurabogeruruwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=top+android+tv+apps+indiaPDF 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_off0000b142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB142 10236 bytes
SHA-256: 73ca8e072033fec1805cc7dbfe1949177c51f2129bf90df3cd4bf46fd5960616
font_01_sfnt_off0000c85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85C 17672 bytes
SHA-256: d5f2d640245bfee4ce4b467be33196821c9a859905fd4606321ed4e12b5adb46
font_02_sfnt_off0000f5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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