Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d60503ee5424af…

MALICIOUS

PDF

85.9 KB Created: 2021-07-01 21:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 868af49e1da3d3fef81d25f15f6d8735 SHA-1: e5b14827d887655676f8f9adb5b22816f018ac4b SHA-256: a8d60503ee5424af044f633ea579e4800e59e494cea72c9c944eda65727ec662
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs that point to various websites, many of which are hosted on compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://drafthe.ru/uplcv?utm_term=best+duplicate+file+finder+android+2020
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d936b2b3d9---69929801040.pdf
    • https://lienlacanien.com/img_pages/file/sorumalodinevi.pdf
    • http://buffagiuseppeinfissi.com/userfiles/files/sefanudotekuzabe.pdf
    • https://hissekurban.com/resimler/files/80804017982.pdf
    • http://157.230.241.115/image/upload/File/85950437733.pdf
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/b7e633c7efaf7070ee02884d6868c98c/38773579220.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb13758a0c---leladibul.pdf
    • http://amphorabeautyclub.com/campannas/file/60669378627.pdf
    • https://mariellatriolo.it/public/file/wisaxikir.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608335bca2f42---36056275090.pdf
    • https://aspirans.com/files/file/bobijukameboniwalodelolo.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/d4910ae970b40c0b8354e668abc96fcf/rawerozoxexesowow.pdf
    • http://msnladyboy.com/ckfinder/userfiles/files/letunidat.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/55382523560e827e4409183abf2f5eed/nadezavipenejovoda.pdf
    • https://anmimar.com/royal/userfiles/file/fidonenomuxakatoji.pdf
    • http://birnagarcollege.in/userfiles/file/14182217742.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/p4i62ck5f9dd45rhr3peoidsm0/24289323870.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/feae18c4c02964049af1aa317df3d69a/nuwefosobino.pdf
    • https://sitpchemcieszyn.pl/_sitpchem/file/46248916642.pdf
    • http://au-coeur-du-temps.com/userfiles/file/pumatexizuzulowaselawedig.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941770e5366---kubigegitinimaduzasuj.pdf
    • http://imaginove.eu/data/Files/77403290794.pdf
    • https://feldmann-spedition.de/pics/userfiles/file/zidofutefokuxaxekenapavum.pdf
    • http://afghansolar.com/userfiles/file/bitimezufat.pdf
    • http://premsaktidal.in/userfiles/file/81197285171.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/649ae024abd1412739b10306eacb5db7/gavuli.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_off0000ec2d.bin
6ee6858485d776a6ecc93a6ca1631f1a7682f9d861b036add5e03511eedbe838
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2D 16940 bytes
font_01_sfnt_off0001185b.bin
cf9fc7d978d229fe93543fd55cacefc4248886e261db022fdbeb50035ae82cb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1185B 11008 bytes
font_02_sfnt_off0001321d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1321D 16792 bytes