Malicious PDF — malware analysis report

Static analysis result for SHA-256 78385540043e2e38…

MALICIOUS

PDF

84.2 KB Created: 2021-07-18 03:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f3d7496ced312bd7f10cec70ca0a9ce SHA-1: 742a63fb5988b114f0e45d34f4c4eb07bba91589 SHA-256: 78385540043e2e380fa174a1fb6b2bb67fba766d80728eb81961c60464c7da12
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the links indicate an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://grandchainfamilyfoundation.org/clients/85333/File/69359611802.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/9c337b3e7bca218c3b92bf8c075cff51/kajopigefo.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/bg2bjr0ji9vni85gaaa85kd5dv/45040714611.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/5qcsdr7nb9akdfvg1eelaavids/76351795302.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95fd85738---xelabigufudeb.pdf
    • http://kamkmori.cz/ckfinder/userfiles/files/tujewolujatokul.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/0943296ea25c7781c5d0282b70156e68/24927426246.pdf
    • http://bioterapiazabiegi.pl/obrazy/file/3464588554.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6f25bf3e4---44839930103.pdf
    • http://travelport.pl/userfiles//file/368049842.pdf
    • http://davidlbrooks.com/clients/868292/File/6239209861.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/0d3c6cd15ab8094f4f6ba6c51340fbb2/kusepirotulekipenobam.pdf
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/44172822025.pdf
    • http://157.230.241.115/image/upload/File/63458391912.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/f2aad6b2d578f603ce8914ceca06283b/kavoxitiwaroturo.pdf
    • http://ferramentabelleggia.it/public/file/tadobaradesef.pdf
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/mudiro.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d96b53141---88424831525.pdf
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/rojigamuxobomolakimez.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/11ca965c87fa4157ba7e2bfc71ff91a2/81570292136.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e0987b66bcb---81841547538.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/386851b7c169895f15646baeccb0004e/2117644551.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b00ef248b1d---visizonifu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=business+research+report+format
    • 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_off0000e86b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE86B 16792 bytes
font_01_sfnt_off00010082.bin
b847ae721a7d4db502cf0561388b968e40b23ec42f92e541d10f57f82a450eb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 10852 bytes
font_02_sfnt_off00011970.bin
a76da3a7c71b1d35d75d98897641c30d33951d7750e4d7395a0cd6aa5fd1d0e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11970 16368 bytes