Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1f1d62be41e62f…

MALICIOUS

PDF

127.9 KB Created: 2021-09-13 20:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a46445c2866b856725def38b35360e18 SHA-1: 0a94de1a625bc5e657aa6a05ae36f51e91ec9c5d SHA-256: fe1f1d62be41e62fc068ea6126bed9b3495c6a3eb46bbb2a39e549648246c32b
126 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with one heuristic specifically flagging it as a link farm on disposable hosting. The presence of many links suggests an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/togujixoniwawadamexux.pdf In PDF document text
    • http://getrade.net/uploadfiles/file/zegij.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/18979422956.pdfIn PDF document text
    • http://old.arcnet.org.tw/ckfinder/userfiles/files/zavegunepe.pdfIn PDF document text
    • https://vientangluc.com/upload/files/69943414057.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/jilugifupesemud.pdfIn PDF document text
    • https://inarsindbari.org/uploads/53690918777.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/27535169845.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136eb68be163---wefojidur.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/376509148.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wepapigunufefi.pdfIn PDF document text
    • http://tzsunup.com/upload/vewarubovomilawonujafip.pdfIn PDF document text
    • http://cantinachitarra.it/userfiles/file/xuxamadojoguxejiregobona.pdfIn PDF document text
    • https://equalland.com/uploads/File/pomobilos.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/32522062958.pdfIn PDF document text
    • https://vinasimex.com/uploads/file/20222650638.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/nubamutoda.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/43853141628.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/pagedulizunenedura.pdfIn PDF document text
    • http://clevio.biz/fckUpload/file/vojegugekug.pdfIn PDF document text
    • http://gevenschoenen.nl/ckfinder/userfiles/files/zisenisesadosuke.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/wiwileponixajowosolew.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/78837046654.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/vurigiziporaxarovaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=android+app+that+runs+excel+macrosPDF 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_off000188e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188E1 20568 bytes
SHA-256: f8af0ddfb38d307ba1869911b109addf9a8599decaed879c99b7283469191824
font_01_sfnt_off0001bfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001d801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D801 10960 bytes
SHA-256: 736b622882494755a4b3195b6268f1a90bd917b24008ec1f038f6a8dfa26b44c

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