Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9aa1ab0f00d4ed…

MALICIOUS

PDF

106.6 KB Created: 2021-06-29 18:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e277192960400458d8f0b474d3e44dab SHA-1: e76339c4777f3c87f2f3f0795311eb84e11390b2 SHA-256: 2b9aa1ab0f00d4ed1aa5dae903e5a8cc6e6bcc9b022d5d97182990dba82b4c6d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9698

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://wastran.ru/uplcv?utm_term=meaning+of+fancies
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/g5khrv61mpjpln2opn1vf2ooeb/kosisutipizetu.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/4c342fdc5a4cd494dfd274efde07f43d/28917105258.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c92d44ff---tagubo.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a244aebc89a---57948042910.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/ebfd249287da49691a66121141ba7b53/fujimafururalon.pdf
    • http://thaisomboonautopart.com/userfiles/files/6135420848.pdf
    • http://aucoindeshalles.fr/menu/file/19405379369.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a542c0d3f---77171526217.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16082ccd47dcf9---42365207909.pdf
    • http://hayatteknoloji.com/webimage/file/tilevepodedugosebazu.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa75d5b52e2---wozexakiroxobaguxak.pdf
    • https://subarini.ro/mm/file/70264388270.pdf
    • http://aquatrustfina.com/userfiles/file/jotutaxu.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/79aa5664bcc7a4496e2cea726e37f0c5/23899399753.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/obq0spgjhobvv0tgdgef0khk36/pevosil.pdf
    • http://hysansam.com/fckeditor/userfiles/image/14070041230.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/9240fa195d1a3b5ca61fa14696adc529/32713526840.pdf
    • https://nikosdimos.gr/userfiles/file/lijoxokis.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b8e125152---fafawininafagutigabe.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a756c34caf0---tapafi.pdf
    • http://dlikefulproductions.com/clients/875850/File/43791770718.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/68804dfc7e265f2c7782bdd2861e5b5d/diwuligaretolilibipux.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160761e399c85d---60064418140.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd30100bb9---kovepefetukepovarek.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a8.bin
36c7a6ed24da8dd223a3f076e8f8676fe4ae20031a020459dac5b6d18a5926b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A8 18440 bytes
font_01_sfnt_off00011a1b.bin
6d200902d0237b88597199ed5a39cbcb86c0c86ee6ab57798166e9f796ba27fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1B 19360 bytes
font_02_sfnt_off0001398f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1398F 16792 bytes
font_03_sfnt_off0001519d.bin
4d31d7be8f01e7bd2a8980e079b0d7241529ea3a4af389dbf9a4865bc66bcdf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1519D 16732 bytes
font_04_sfnt_off000183aa.bin
764ce80a2fc6899f7c4ec2ebe1911ca1dbda07e77e1fc950cf84d4bcfc85c544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x183AA 10260 bytes

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