Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f02ba12708275c7…

MALICIOUS

PDF

86.9 KB Created: 2021-06-26 20:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ab0e7cb989ca5c38fbc5aef4c6b764c SHA-1: 4990e97424d8e5043bbbb3d3e8a3f1d97d35dc47 SHA-256: 2f02ba12708275c771fe2be2b006701f6498e56a9932d988c632f482d2415094
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are used to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b989df3b0e6---73433820686.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/1bdc6f81f2943e4d5a41b0677ff33da3/nowomomuxerubof.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f2ec7d05c---41924353568.pdf
    • https://prairieroseclothiers.com/FCKeditor/file/62515445938.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abc8026151---16045799087.pdf
    • http://bhttourist.com/upload/fckimagesfile/33372639231.pdf
    • https://acrgroup.nl/userfiles/file/63171241328.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/875dc87cfd4da90b2c6a53d7c4e9ad6b/90892756281.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/11600669e98a6b0e2673fe3a264d782e/pojivizi.pdf
    • https://ozmutludokum.com/userfiles/file/vidoguramojer.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/a397569b32e2c10faec4aa8b4255fa40/nujujotekimanozo.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/vvvpb87tmuvktph1m4q0or7mjd/91770575422.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750232ec2c9---lamil.pdf
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/21452260370.pdf
    • https://costabravas.com/uploads/localidades/files/27641486072.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609eddf33e25d---bofapuvenilezojikozizi.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5acce72e1---zokefobirixezif.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a1e2c7336---lemojovamolojuwidi.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078a87fa15ab---babazesimo.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c115a5e7630---2459418865.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160ac66d927508---13055087487.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/3m3pvvrurrs9sbte8t3mmh2ia9/zibudazepujifo.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e01f39e35---77818726905.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/kp8t7f2qfmk4jvgmuo3ngpvbgj/11392405675.pdf
    • http://garagehayashi.com/js/upload/files/96982960724.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=jack+reacher+book+series+reading+order
    • 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_off0000f160.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF160 16792 bytes
font_01_sfnt_off00010972.bin
fe97531be1b8dce2851728622c2d2bb4392e6c94e53a69e54b574a64c62e0095
pdf-font-stream PDF embedded font (sfnt) at offset 0x10972 16444 bytes
font_02_sfnt_off0001343f.bin
e3bc8302788e286af0d0c35d1ccadd3b1948dffa5c65f69ce0d6d8efcac62925
pdf-font-stream PDF embedded font (sfnt) at offset 0x1343F 10728 bytes