Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32bfe303e9dd850…

MALICIOUS

PDF

83.5 KB Created: 2021-09-01 02:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0607657b114194bf405bb55f8d658da3 SHA-1: c206ae95fb15d568667c3e798a2a913671aed54a SHA-256: e32bfe303e9dd850225c655c401770f3df636cc2d4553b734e20eba495753ae5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other hosting, likely to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple external URIs and link farms on disposable hosting strongly suggests a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://crysiq.ru/uplcv?utm_term=sentence+correction+questions+with+answers+pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a195b394cfa---jidemonafe.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ba740c59826---bedabefirelakapalu.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/3d18179043231e56f7dd195b3390dec0/79632406053.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b80be292e31---31182258115.pdf
    • http://thicongdiennuocmiennam.com/uploads/files/rakugazolimidinurijuwite.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/64bdcc35761ffcfb9d98f6444e54dfd4/xedebufimuvusef.pdf
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/45079724732.pdf
    • https://ce-mi.pl/uploads/userfiles/files/67905122673.pdf
    • https://soechi.com/userfiles/file/wulunepexumuti.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/5572d4a528397a7341981f0acd785afa/88597240305.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b031a5d9dea---2664584229.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/34018f540006505f6a9e95685fab455e/10641165200.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e00a552ce0a---golejopapiponosusufemamo.pdf
    • http://shiokuda1.com/contents//files/veguzenorogotuzegaz.pdf
    • http://veterinariogiardinelli.it/userfiles/files/33736997962.pdf
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/xovofitakufifev.pdf
    • http://pickup-ws.com/userfiles/files/bobufuwawel.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0c041e499---43721871435.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/6iabttcu2scuqcqsiisdpelfi0/jitutemin.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160da99d0a920c---44936939561.pdf
    • http://regmac.net/userfiles/files/zokazer.pdf
    • http://maihome.hu/admin1/file/76814942088.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a44dc4ac4---gilozopin.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_off0000e0af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 16792 bytes
font_01_sfnt_off0000f8c6.bin
5f2781c06aaf4e8c23899f49e92207de935698ab7dcc7b16199d55e0adb8f85c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C6 11076 bytes
font_02_sfnt_off00011260.bin
0900e7197e8586bb22363919f7a23310a85e57f44874b1ae6a952fd54d6fced0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11260 17536 bytes