Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc88fe45f15988a…

MALICIOUS

PDF

80.2 KB Created: 2021-06-28 11:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e007c1d3d2216a5e8a115b2a617e660 SHA-1: 1dd186cb121a30ee854742e34cfff25624318029 SHA-256: afc88fe45f15988a0bb7f55c985c4ec0e949dfb9b7cb8b63b0244210881c7de7
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. Heuristics suggest this is a phishing or malware distribution lure, with ClamAV detecting it as 'Pdf.Phishing.Trojan'. The presence of multiple external URIs and link farm indicators strongly suggests the intent is to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d54a357bd8---midupokidijorakuxelukexi.pdf
    • https://rrr71.ru/upload_picture/26659310557.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4d99a45c---71605202327.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/4eef3eca96185a4c851959df682f5c60/99002565539.pdf
    • http://creative-format.com/upload/editor/files/dorabofajusunepugowaxekov.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d723cd037bd---74041984903.pdf
    • http://ruishikaishi.com/upload/content/files/2021/06/20210614163728.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/jnoqa6q5g2l8i2fh5fkvul6fvm/33270846232.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091dbddc2711---davafozatovat.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/9h0flp7bv86l9kb6bhl6em881h/67740532936.pdf
    • https://eltonltd.ru/sites/default/files/uploads/96283460522.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6dbbb510c---lisotosatepiv.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/87b5f5ba505065dc51517140fab7f999/10649963179.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897af73c817---damebivapakubiga.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/25791a2dbc49145f5ba6d6de331b7732/92349085255.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609acc43677f2---67889878067.pdf
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/196b35a55d73e462b981e44d6d97ef6b/bepofef.pdf
    • http://myucmas.com/userfiles/file/59435262525.pdf
    • http://artecgroupservices.com/imagenes/file/79711229488.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609aac12b3c4e---jamigiwan.pdf
    • http://klinok-saintp.ru/files/10439686182.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdd67506d5---10568182976.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925a51689be---saparatofuwizaketererog.pdf
    • http://pamat.ro/UserFiles/file/fezotesikurubelekezabit.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/834335f1838c34c99d45b8ba322b2f61/12128334673.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1609bef83037ab---92841854316.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=joseph+campbell+pathways+to+bliss+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_off0000d42a.bin
0fcc37de3f46e75f909cf84c5695c2b99899cce3b0e2dbc65251ef1b0da63186
pdf-font-stream PDF embedded font (sfnt) at offset 0xD42A 17836 bytes
font_01_sfnt_off000101cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x101CF 16792 bytes
font_02_sfnt_off000119e6.bin
9134411f73a1d78981f7b7d58cf7be51fd54640ab82b86bad5b3bf8215297268
pdf-font-stream PDF embedded font (sfnt) at offset 0x119E6 11012 bytes