Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb14d51551a8cf20…

MALICIOUS

PDF

105.6 KB Created: 2021-07-08 05:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d54f864f7a0b02314c97d471017bfe1c SHA-1: 95e45b30a2010af8a6fb96681135f3a70be3561b SHA-256: eb14d51551a8cf206a46f4eb3cebdd5c8e2743c217649424efa83a7809f80d7e
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites. These sites host PDF files, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9654

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://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c962e1d337c---37050770117.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076937938124---kodilavonokurudug.pdf
    • http://adamlegal.com/userfiles/file/fimeweleniwuz.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/8ufvml6l847eqnchurbs2f9d5b/jisilijikoz.pdf
    • http://progfin.pl/userfiles/file/sivupepos.pdf
    • https://almuhja.ps/ckfinder/userfiles/files/15945710536.pdf
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/voruwekelo.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dce3fd636b1---93844358485.pdf
    • http://ajtoablakcentrum.com/_user/file/dixow.pdf
    • https://cabsfromheathrow.com/userfiles/file/kurodilapebewoxomasuxob.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d70cfa64248---sipawidaxatelirogoparigow.pdf
    • https://thehideawayresortpattaya.com/userfiles/files/nidumakuvetajox.pdf
    • http://anipetkingdom.com/webroot/img/files/74614124957.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd5eb21500---85440876179.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1609223b8d4df2---36928243243.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/f26f2d352a6bf7eb4e0a924c35e32429/55954250977.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/4320d056cdbec4d1688c8eef0ee26b4a/13844761283.pdf
    • http://lhdrum.com/User_File/UpFile/file/20210604090927_cGlyaWxhYm93ZXdhdGlwYWxlZGly.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/645725c5834469f992e1c696331861bf/dolijidufijipusubus.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607542704c43f---86161720145.pdf
    • http://hakkabrothers.com/userfiles/file///762664461.pdf
    • https://agatanorek.com/files/file/vukekagijeka.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608292f2c3248---50658417815.pdf
    • http://phs1961.com/clients/2/29/29da8dc1278d8f1c58a3d16208bcb4e7/File/4050601445.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8331a70305---rivelurepexuza.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/pv913p2js2uf37neqdfq86omo6/famipez.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=here%27s+to+the+one+that+we+got
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012be8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE8 16792 bytes
font_01_sfnt_off000143f5.bin
184a936bd1ce5dff700adc4e6a12c67a52a21ba3f6bd4f31defed58e18ed8b92
pdf-font-stream PDF embedded font (sfnt) at offset 0x143F5 1856 bytes
font_02_sfnt_off00014c99.bin
a2ca85dd4adeb802ea01e96bccbfc4b82c40aceb0b4129186206c06b551c1a5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C99 22036 bytes
font_03_sfnt_off00018196.bin
b3768497bdefa31b5bc856cf2f35e1f21f7ac0bad25b45a5cbb26b673d89df06
pdf-font-stream PDF embedded font (sfnt) at offset 0x18196 10360 bytes