Malicious PDF — malware analysis report

Static analysis result for SHA-256 300fe1524fd5d291…

MALICIOUS

PDF

97.9 KB Created: 2021-06-27 19:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0261acd359a50c3ba8dac98a71073e13 SHA-1: f81e1d76990e28b114df90cd58a32e967963a194 SHA-256: 300fe1524fd5d2917e4def8554ab5c74ad9cee1ba1c72e9226ce7c79aada2304
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/e4fe99a330673e2f905404226fdd5c65/1199470445.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed1251c7f5---28765792460.pdf
    • http://wawa757.com/uploads/files/32444723204.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/k9a9osiljp9ecusosiebvgp2va/zanigojukegedubufiw.pdf
    • https://giverny-bkk.com/upload/files/10769688446.pdf
    • https://ms01bet.net/contents//files/12748127068.pdf
    • http://yjsyrj.com/userfiles/file/libopatokinore.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/kowusuretemuwa.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/444a7b1fac958956d6bf2666aa2ee42b/jaxupelevijawojalag.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a445443fd5f---55986398285.pdf
    • http://okmarin.ru/userfiles/file/30399235315.pdf
    • http://bitite.lv/media/txt/122/file/zavig.pdf
    • http://paintmaster.hu/js/ckfinder/userfiles/files/61637752280.pdf
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/56198638780.pdf
    • http://hum-lucknow.org/test/fckeditor/file/navatapumewurerotigilap.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1c43dbc51---48398559963.pdf
    • http://bertrandetgastineaudesigners.fr/userfiles/file/72041541132.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/27db3ed2cad8b9158b800e329acb7659/16461688765.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094b76a814ce---jeros.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/f6fe0b41ad9703107488bb5cfad0b255/68865439627.pdf
    • https://sinhadventure.com/uploads/file/85261786206.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/995083a46683cd5c5fb65bbebef36b02/nukogisupawe.pdf
    • http://scoutpate.com/userfiles/file/lesesiziwigesaxuzalede.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2d410d775---farepixifove.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/f8f21dfca30d9a45b67bb7a184aa6ea9/josixobojogipalabizul.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce1166d352---govapopojilokibetodej.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=pulled+calf+muscle+running
    • 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_off00011be0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE0 16792 bytes
font_01_sfnt_off000133f7.bin
571f977620ef8180d93929267bcf54fd9497d64f4c6e386d3b51d18991c04ee3
pdf-font-stream PDF embedded font (sfnt) at offset 0x133F7 10704 bytes
font_02_sfnt_off00014c38.bin
5c33edceed5f2c707b16d0ddc41d65a8ffac1b424444fb6a42570b6787ecae1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C38 17212 bytes