Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6700c8b129b4658…

MALICIOUS

PDF

83.4 KB Created: 2021-09-21 03:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 96108e33f05a2e76c79bb691b9e3055d SHA-1: 1f775d70f7344ba4772f8e9d2118f3f9e84c8031 SHA-256: a6700c8b129b46583b095d7547cb82269343df2a33e9f973a135275ed5c90e5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents that may leverage embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://garglob.ru/uplcv?utm_term=how+to+sign+out+from+google+play+store+in+android PDF link annotation
    • http://www.corazondelsol.es/ckfinder/userfiles/files/54512643714.pdfIn PDF document text
    • https://denimder.org/resimler/files/78203188026.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/12171069026.pdfIn PDF document text
    • http://emannsltd.com/userfiles/pejodorazo.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/xigovapanuz.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148f7d4d900c---dosefidanof.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/80310656619.pdfIn PDF document text
    • http://henca.com/files/details/file/14796337199.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/70206553655.pdfIn PDF document text
    • https://onecre.com/images/content/files/45824245898.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/20007828788.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/809fff04f44631995699bbc926258d72/48756902063.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/woxifi.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613767dcbad00---relinexubibunujirufuni.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/m7kg6tcq53msb4d15ftpn3pg3f/25356317567.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/didubakepofiverakaxo.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/9523073672.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423f002ef7f---runuvilutuwofuj.pdfIn PDF document text
    • https://kildevangen.dk/files/83993382685.pdfIn PDF document text
    • https://www.tahitotfaluovodak.hu/ckfinder/userfiles/files/pilezelugasebuwikozere.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/66828409839.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/sanidiwom.pdfIn PDF document text
    • http://turchifiltri.com/userfiles/files/45292016070.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161438e074da3e---madejonapi.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/12962548089.pdfIn PDF document text
    • 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_off0000df5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76C 17740 bytes
SHA-256: 34032fbdd59630a15bfad293e55cc8c8e79ffffb70e287c9b70111e4d80e200c
font_02_sfnt_off00012568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12568 11132 bytes
SHA-256: 56c6147ea478c5e35198a80e2205aa22f2d797c6a17f33a5c15cb116e326f8d5

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