Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee52b4ddc41552d…

MALICIOUS

PDF

87.4 KB Created: 2021-07-04 07:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c42a9570dc394bd0337a47372700dcf7 SHA-1: 1d110c8ea700b56fd0966b02177bd9b025e6fc35 SHA-256: fee52b4ddc41552ddfcaceb35b75e170ca0a39f2c04cbe10e1cd4b40485859ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://archism.ru/uplcv?utm_term=python+projects+for+resume
    • http://iltorg.ru/upload/file/bubapixetisubujaj.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607505aac0417---tofomesejojusag.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/7bnd9ebth9m4ecstklob1ub98g/33041088283.pdf
    • https://menu2uplus.com/images/file/56331632524.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160794991c0eb4---lativa.pdf
    • http://amon-syotengai.com/userfiles/file/dowawadekizaxunote.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed39a1e8c4---12582888143.pdf
    • http://kaitosushisb.com/uploads/files/rajulowuregux.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/c89ca8d47b905b9b8e44cd9a3c28928f/71742603929.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608125a2493da---levazolefejiwapofe.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607057b61fde3---26029393252.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4eb8d1869b8518a29b3ad15f7fa932a7/134597739.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802ed082710---fadebawiwiban.pdf
    • https://autopratichesas.it/file/geburej.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb7ac82c51---94413987863.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d3cad3a01f79cd882deebd090efb31ab/2414328487.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/faroduge.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/2466c7aa591f19f7bab80f54832f6d55/24603510131.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ffca2e480---679154892.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cd4c782728a---80411452668.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/2b58fdfee54efd82728d059207def39f/10746631003.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/t63irrbn5gh96067lbnsj13t46/89755112091.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160871d3be3b1b---68880589844.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607891808e7fd---zozijedutamolusigu.pdf
    • 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_off0000f20f.bin
008fd795685d9efddbdf33a1d54b2b5def0455746637819df924dc63023fa559		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF20F 10788 bytes
font_01_sfnt_off00010acb.bin
7e8ba619733a369509620de21ed4184f6cc94a100a04a0952caa7e4d300accce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACB 17292 bytes
font_02_sfnt_off00013815.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13815 16792 bytes

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