Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86dbea30857d651…

MALICIOUS

PDF

82.6 KB Created: 2021-06-27 00:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43de49986c8d4fb18a44438411053ef9 SHA-1: 3a80978ee2ddf192da476b43277ee222db1bf50e SHA-256: f86dbea30857d6511873d3f3d675e1f5553d3ba593df63fd0210b88847b47985
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://metapolar.hu/tmp/vazorawav.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/92967688194.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16071965bddf04---jawowupedabaji.pdf
    • https://ntwbearing.com/UserFiles/File/motojelekipazemepam.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fda204b04---lupobuweda.pdf
    • http://sungsam.net/userData/board/file/purizusozaguvame.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/681086f6b572f1311cfe9510be879435/13741213546.pdf
    • http://phuocthuan.vn/images/pic/file/lodawod.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/bbebe391009ea36c6815694c3214a97b/surewopodim.pdf
    • http://hurtglass.pl/upload/file/lumija.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851b61d4c2e---97226951670.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/ph776jkp3qrjvvtntc9snunoqa/70793293303.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087c21472f57---wizimifejajulikatiwuridul.pdf
    • http://hilltop1976.com/clients/24685/File/dupevezubekin.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ba007878d---64891856695.pdf
    • https://nnt52.ru/userfiles/file/88593781345.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16089b07445f8b---xawiporin.pdf
    • http://vamaconsulting.sk/userfiles/file/98490000079.pdf
    • http://datev.hu/ckfinder/userfiles/files/dilawifebafozetimuja.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/9jmm65la22j6hior2o1bidhfag/76660255381.pdf
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/rupinitesasedalitu.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cb9f9175c---molumoxa.pdf
    • http://www.findvoters.com/userfiles/file/jamotuzitiz.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c122bf4737a---melenivupi.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/f71b455c9bb2d1c5d79a356fe45f50e3/64518916693.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=nobles+ss5+service+manual
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000debd.bin
3f6b680848e906d5b0f10428c0e71eac4544ebd83e3621ac04cfb43153130dd0
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBD 17528 bytes
font_01_sfnt_off00010c7e.bin
8eed614580404252b04c33b29c0b15145a26a430355db84b36dd6ac1177f46aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7E 10708 bytes
font_02_sfnt_off00012523.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12523 16792 bytes