Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3394992201aef03…

MALICIOUS

PDF

87.9 KB Created: 2021-07-03 07:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: def840d7fdba20682a455315f4b889fd SHA-1: ba2f0cf154a3ce9e041ce63dd383a6cd3b4e335e SHA-256: b3394992201aef0397331361e203dfb360d3271185341d1aeeb182b96ae4615d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of numerous external URIs and a link farm on disposable hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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 http://wearefamily1234.com/clients/3/31/31b46d3307e4516335aa88350909469c/File/gudumigategopunojupawut.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/42479c8fca2da831c43d923281dd51e1/3714056094.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fdd521e03---50361437805.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160810e8fdc6b5---kuzejifevazufati.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608925dc4b1db---3823725912.pdf
    • http://www.css-jp.com/upfile/files/2021/06/29/38679188017.pdf
    • http://ibb-online.ru/f/file/bavum.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/1f1b9c79eaec63a050972e8a090b4701/wisozoganasomonejupo.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608c80d18b355---12876853525.pdf
    • https://gymlesgeants.com/upload/editor/file/bonimisijotofarepupuke.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160b7f401c702f---17199245627.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/443db33c550e42a0c05b5c62890f39ee/72221843512.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/4bdad6b0b94a47545d48dbd9f5e2b666/pakugixubodebi.pdf
    • http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/noraxekabu.pdf
    • https://roweryelectra.eu/app/webroot/uploads/file/16202319745155.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab5a0727fb---kimunom.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/76a859df93fd182c0c617c78d56b05b1/38552510370.pdf
    • http://markasib.ru/ckfinder/userfiles/files/ragidijodit.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cb98c746c76---pawokefoxupewesinadunoj.pdf
    • http://harasim.cz/uploaded/files/sofogaduzuru.pdf
    • http://zzweien.com/d/files/36956665990.pdf
    • http://phunhai.net/upload/files/giputubebefisaze.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb06dbbc27---44201535831.pdf
    • http://arabic.cz/ckfinder/userfiles/files/53702477803.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/iq3gb42tpl9b31pu97f9lk7s8e/15196238472.pdf
    • http://korean-school.hu/hangul/userfiles/file/46016728407.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=psychic+and+the+genie
    • 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_off0000d70f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD70F 16792 bytes
font_01_sfnt_off0000ef21.bin
3a4c92d81a0cf09cb71d897c0198751b13385155c3e071641dac2177b3ab6615		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF21 18052 bytes
font_02_sfnt_off00011ec3.bin
ee63b8dc9fc607ffc91fb4cb3b5967a2f7da262ff6039f1b5997fda8be770a43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC3 17872 bytes
font_03_sfnt_off00013a27.bin
471a515227ea64071722dc27293cba84e387936edb0f68a59bc24c4a42e933f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A27 10500 bytes

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