Malicious PDF — malware analysis report

Static analysis result for SHA-256 804302bb91a9e7ad…

MALICIOUS

PDF

80.8 KB Created: 2021-09-06 19:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e26febf5a0bc489a6d525643f5c3e741 SHA-1: fbeb1ce893210b9a238614da127b72954ffb16f9 SHA-256: 804302bb91a9e7ad62f807b4eeefa4078d375ed2ac8bf7309c1d61964555187b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to potentially compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.vegagastro.pl/upload/file/xevubexaseneditolej.pdf
    • https://aymexco.eu/ckfinder/userfiles/files/wokadifuwof.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/eb5ec801cd4b569f0c7938c90f7e15ea/jolux.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/2rsmvq8bkbg5q70o2kdnadefqj/xosatixawejalu.pdf
    • http://firmykominkowe.pl/Obrazki/edytor/file/jatozizafotovipewuwodoz.pdf
    • https://vpmemorial.net/images/file/66978086941.pdf
    • http://cgl.lu/userfiles/files/wenobabanopeduxuwosidowox.pdf
    • https://acrgroup.nl/userfiles/file/gavewunemunibazotejo.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160854fac20a74---65658204356.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16089d536bddf6---xipopubugoxizu.pdf
    • https://kurtoglumob.com/upload/file/poguwarolebi.pdf
    • http://gistys.com/userfiles/file/golamoburumoz.pdf
    • http://timnhanhonline.net/upload/files/muzipapoligulid.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/186d83565bff23c056c3276946817b00/pebopizoziju.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091536f787e3---vidulanu.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/a523dc2b0eea5e591ea59e73bb265aa9/boxijasizer.pdf
    • https://cafepiolho.com/uploads/assets/27671289543.pdf
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/3342221972.pdf
    • https://cvzona.lt/resources/img/files/zuworutatejafudozi.pdf
    • http://savalis.ru/userfiles/file/julujuzobomijewek.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/803403804911742ca05082ce5f4937df/gumomuv.pdf
    • http://dailygiasi.com/uploads/userfiles/file/77664458601.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=create+a+website+using+php+and+mysql.pdf
    • 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_off0000d61f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD61F 16792 bytes
font_01_sfnt_off0000ee31.bin
f1c4a0c387ba94bf9d95ba308bb52be1939c200aa73b549b433ff0def0de6201
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE31 17636 bytes
font_02_sfnt_off00011ba7.bin
4997a24185a8bb636c5fb228b1abb384e0d2c7ab7427fa605cd934ae017dc446
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA7 11508 bytes