Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4096fc1ba44a8f…

MALICIOUS

PDF

78.9 KB Created: 2021-09-07 06:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 86d536fe4c335f1e8d528e7bf3f76c47 SHA-1: ccc01de3c07cd5cf7033b1a5a833741038f7d53a SHA-256: 0e4096fc1ba44a8f0a682d3a97da839a69876ba94f0be86c5d3f1ce90bf7b192
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains, likely to lure users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests an intent to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://flomojapan.com/upload/files/bavuturowujupulizuxade.pdf In PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfc304eacf---94596177388.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/nevuforanuwes.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/87054fa14247cf25691d081d97049649/fetezosunamiwigabosubafo.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/badobisovanufepa.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/a188280b8395cc99daf5785345778eab/meluxekerew.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/9k7nc28kqmbsm1gqukgb80ta57/babobi.pdfIn PDF document text
    • http://exteractif.fr/pictures/2/makofenedeloxul.pdfIn PDF document text
    • http://minicabii.com/survey/userfiles/files/jotabalufe.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/18j8bhprjp22jpg2j8p81d3a55/mepewirurowub.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b0a4decac---45515320338.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1611475b705617---29192403839.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160acc6e0d395f---28546609185.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/11791421000.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16102899d25be2---dajumu.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/16765923811.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/91462400812.pdfIn PDF document text
    • http://bearcatbb.com/CKEdit/upload/files/75246173265.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/voxirutexigizudinipudeb.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160978b30a38be---32448451279.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/2417507288.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210814_7AD45BCF11BEB33E.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/27863075789.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/9fd0af2d79295289f9d5e49277f07144/kogowazimemajomupuwigejib.pdfIn PDF document text
    • http://veterani-pushkino.ru/userfiles/files/20252803026.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=arlo+pro+2+base+station+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_off0000cdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB5 10752 bytes
SHA-256: 14ee23e5f08e5353607bff793eb636ea3a43441e488626bb59eac2da480e525c
font_01_sfnt_off0000e63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63E 18588 bytes
SHA-256: a2985234d9893873f3853646cf36711be2765db10985c3c7f4f20d1f6ae0931d
font_02_sfnt_off00011610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11610 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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