Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe2ee4f76c53179…

MALICIOUS

PDF

88.6 KB Created: 2021-06-26 18:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36d7dd17e32685059ca9a65d6cccedcd SHA-1: 41fc8513908c1f2862cb774891f40d9318b5eb55 SHA-256: bbe2ee4f76c53179c6450d79652229fbd4eab515406aa4712270752e84169eab
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as a link farm hosted on compromised WordPress sites, and a machine learning classifier identified it as malicious. The presence of numerous URLs pointing to potentially compromised CMS uploads suggests an attempt to distribute malicious content or phishing lures. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/bc4512c578dddce434d45d9030d6b075/40402465860.pdf
    • http://gayaarchi.com/userfiles/file/20210621170311.pdf
    • http://adbuffalony.com/uploads/files/xiwatapuzinejev.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/0a04vpqji8d7h541eahqcd8uf6/70070867621.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070cb7fd5324---roxemapef.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aea9e099a53---2007294046.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/jedejatopeko.pdf
    • https://serini-cloud.pl/uploads/editor/file/vujuvesu.pdf
    • https://steklo-shik.ru/userfiles/file/fizefakazezetotaboki.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de1928b179---14637607959.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e13f2a516f---pokawati.pdf
    • http://www.annaleehuber.com/content_files/file/24238913134.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/ccrlegjm4300a012anj082qkd0/nilofotadazakuwa.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eda39efd40---wiraxukufo.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9b03c1a14---49405433922.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa46830200b---67760617400.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/336afca1ce2c38c55c2b3a0ce5587117/tidojefuxod.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/6kql7f710tppnpua6vopsvmaah/41927435491.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/tv2v0nv7m2l7mfemi81r22v7n2/voziroxixomapifajedoroku.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607017d72a88b---pegixa.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/fg8mt7ehp43s7ff03n61qaq3k4/silope.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/i8fgf8k4fklk9dn0kn7i0gh252/tatorexedotez.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=capitulo+5a+8+crossword+answers
    • 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_off0000f637.bin
0e9788bae4f43ffe088394eab0ea8b6d047fccfd5b6aadad8c008a4a163e423c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF637 11064 bytes
font_01_sfnt_off00011040.bin
8286f11264cc7acc9aca236172cf305a4ff5708200e26db2efeeefac767325d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11040 16796 bytes
font_02_sfnt_off00013b63.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B63 16792 bytes