Malicious PDF — malware analysis report

Static analysis result for SHA-256 1568ced98fae3d0b…

MALICIOUS

PDF

95.2 KB Created: 2021-09-01 06:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3039af4ebff54524915e196c3c3fe2c7 SHA-1: 8a90286b11dbe4a0c02977f0345d7266c08b5453 SHA-256: 1568ced98fae3d0b93cab14ba7db616dad7449d1d62a69398ebe313a0e659dd6
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites, including those using CMS upload storage. The presence of these links suggests an attempt to lure users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://piotrkowska77.pl/zdjeciafile/vojedumuxo.pdf In PDF document text
    • http://tfh-filter.hu/_user/file/repudagofewez.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/durokizawexarir.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/68b2e26c22e6f21b0cc6258a04ae0b0b/bebozavisaw.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2a69f24d1---97765730429.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/29f1011d84386f0cca1ba1484c91369e/vuguxizumirenevituse.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2379c2bf2e19e211b575c4a269b77bd5/xodalokis.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d91ed2dd00b---21903589813.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/80221879677.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/723cf48ff53943177d6670ba4030543a/29051049747.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/tafiwonekenugemolawe.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050402215513.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/92075872288.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/56099528667.pdfIn PDF document text
    • http://jx4d.com/userfiles/file/botalekugajolamajut.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/8f6adc58075b09dbfecb1e5ee8460ac8/witomi.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cd93797b6---bavuguxutug.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/c3slmr4aff6ikorn0uabf5q8tr/26731841605.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d9fbf1bd0---wotali.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210620001318155.pdfIn PDF document text
    • http://synowka.pl/galeria/file/50624822130.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d987a95b5c---53874995104.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/redaridovalivizawameg.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/3836voknkum4ji4kv9ilctaklb/fujifirelowovonegaz.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210627_065326.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=new+bollywood+full+movie+download+2019PDF 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_off00010f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F57 11092 bytes
SHA-256: 5d41ca0e753889c9bd9275c83717c8da1db226ac085fe9a735c343ec3894e354
font_01_sfnt_off0001294b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294B 17296 bytes
SHA-256: fc0f2a4b8191332a9e4f1267b45e2108c48640e9e9eef67e3140f690e9e1998b
font_02_sfnt_off0001562e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1562E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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