Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf2010fae4955c3…

MALICIOUS

PDF

89.2 KB Created: 2021-07-13 16:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 87fbc56af2e0bc7e71d513f180e0da40 SHA-1: 353e1eef13e97c628d48b47ed2fda7345261df82 SHA-256: ddf2010fae4955c38389239367785361a494ed962fd2b5362e0222f4e9e20c6e
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, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, likely intended to lure users into downloading further malicious content or submitting sensitive information. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous distinct, low-reputation hosts to obscure the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 http://brandnewgoods.net/userfiles/file/wulugax.pdf In PDF document text
    • http://zap-interactive.com/uploads/files/moripuwiwemuvigowuxafaf.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160754182772e2---67979850209.pdfIn PDF document text
    • http://lphs-the60s.com/clients/5/5a/5a84a5cabe7f31a06b4bf99f7e1b7ad6/File/16699598013.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160b753e6bfc31---jobozuwugerezojuri.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/87363695350.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/59782230378.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/90791325865.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf5a2e80bb---kopajukezaki.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/75s5fvrli92k7uoqsbb7n27q30/81932235255.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16209425972131446371.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/8598570924.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/lrjvrfe7ut7c4qco0gpofv8k0g/54788938724.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/41978783725.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/29661717263.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/vafolakemes.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ea5208222---jozasonimegezofew.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/a1t6v3vncirb05vthvr1oh10ik/nosijijutokutu.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/pojod.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/280d43fe92c5a1392d9013847e5383df/50517353038.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/xujoziwewupodiketop.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/f7fb8e927ef43f6d73a84b8ed02d734b/74176581995.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210626035654.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/40d088e2262a2b171813dd0dab205abe/mokifujidejokabuwo.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/8vq01eklagbl8kc56i8ccnqkb5/tefilozufux.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/d3b71db64881d40397031c731bec918d/navivoferu.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/70974189092.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=countrywide+home+loans+incPDF 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_off0000f796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF796 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA8 17316 bytes
SHA-256: 64a4f26e664ee7efbf20e02546b2552b2bcd27b829dececa424a31dc32445d41
font_02_sfnt_off00013c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6A 10964 bytes
SHA-256: a009993cf2d72070dc3399c7d1d44ff6b93c4fcd68fe4abe24b68725564aba5d

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