Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7af96fa9a856f6…

MALICIOUS

PDF

80.5 KB Created: 2021-06-14 07:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30985e0884ee81e2a6fbdcd619627133 SHA-1: 6b020f6e5b1d3c489467480bed6ff5b749f9f43c SHA-256: dc7af96fa9a856f6a871f7fd6a9b9cd088dfacf430e24f35cb63a2b47e3cab63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The presence of a 'harry potter tamil dubbed free download' lure suggests a phishing or malware distribution tactic. ClamAV and ML classifiers strongly indicate malicious content, and the heuristic firings point to a link farm designed to distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://infrive.ru/uplcv?utm_term=harry+potter+tamil+dubbed+free+download
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf2ca6e3bd---peberomevodomefix.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/34f05991537ef2fd7f94a95953aec2c5/gapevolimebuzejid.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e32e86853---3408970863.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d47f7349ed---wobarimub.pdf
    • http://staceyasp.com/UserFiles/file/vobazopivotef.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc3c12ec1b---tupidijuginija.pdf
    • http://gallery4walls.com/upload/editer/file/vuwifisixizovigepi.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/s87d0h5ljcrqnlpgfug4m0p8i3/meletop.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a710e26b94---sufigi.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/b29ff04e8f8b61a03394b79e3e14547d/zurob.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608b42245509a---sefuderisedinaveredovuxi.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/af8142a48c8456c933425c72b489925e/18240132860.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818639aced4---wogebawotojiwazurojesu.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/f7qoj909v3qdf4icirsmgtgcr9/wakujexozagifikovigagif.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/b97794d1c0398a90127c69ee7aa42cd9/wizufuxenebugajax.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/14713dfb81013ff228b87b6bfc1a1d88/70556693805.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d9a445d08---28133986613.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/0edffe7ef622fc8240bdff02f3941595/90005522212.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16090f0628e630---pigikebemimokilawen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faf2.bin
1b043c9af0790bb2002c360c28e41e71a882fb9b221a8da77ca29739256ccf91
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF2 5304 bytes
font_01_sfnt_off00010cf6.bin
7f9fd9d54dfc9619d56eb360c24f519b14a037cd7feee9ddacc7e8f031740dc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF6 11424 bytes