Malicious PDF — malware analysis report

Static analysis result for SHA-256 7512ea94c32a6504…

MALICIOUS

PDF

91.2 KB Created: 2021-06-28 09:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2df42f759b1e012e957f86b2ddbeb5f1 SHA-1: db829059af26227f245c859cee56830507558be0 SHA-256: 7512ea94c32a65049b620a4d4bf252fc73c6a04379309fb589bca14ec640a290
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and link farm nature strongly imply an attempt to lure users to malicious content, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bef3f3544ad---97310036257.pdf
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/basovopiganimisepabagikej.pdf
    • http://deurenhanger.nl/userfiles/file/10796613755.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16077e283b6211---78455531083.pdf
    • https://clumba-indoor.ru/files/files/wijemofukajitanefib.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc5d345d92---kolijabazoguzezab.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086178f80855---rorom.pdf
    • https://bselink.com/userfiles/file/68444223264.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00f956b57d---kupoxuruwabor.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7d0a0c3eeb55bbf86e761db1d8e7e4b8/witafagilavinifasa.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e1564edee5060bb7a5f19c358c99433f/fekebegijawebup.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fiob8t24suugi5p01v9jrc9pkm/milogifinawezi.pdf
    • http://castrolmintabolt.hu/images/upload/file/91480262146.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b62363d36d---xowalajupipuj.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3a5j1baq9n737035si1je1qlr1/16578251619.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7aa01e0d2bd293ffcc4d6a38104c0b2e/66820086225.pdf
    • http://vds-construct.pl/userfiles/file/gavenaxuzunojupidoxikimen.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e09c10a946---27848033922.pdf
    • http://etasystem.net/userfiles/files/43653708925.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704fe716ae9---malakovirobasa.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8946112e00---xisemavebatijovasikifabox.pdf
    • http://www.dismaplant.com/ckfinder/userfiles/files/xezaj.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/3b307a3d1654bc42af1e2750caf15fce/vubokunowi.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609be2980938c---baxikuligubi.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/8015747cb5f3370e77e5d10c5b755002/11186528508.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cooking+time+for+medium+boiled+eggs
    • 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_off000102a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A2 16792 bytes
font_01_sfnt_off00011ab9.bin
77054e72d0dbaccece27cfb8df47bbd6485d7c11e82ef4676ded021b08f2c8d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB9 10900 bytes
font_02_sfnt_off000133bb.bin
108cb6cc2eae9600cabcce09778594f8b26031d7deb2ae9bda9031e84b3d4b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133BB 16944 bytes

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