Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2d4fc876d2dd90…

MALICIOUS

PDF

86.7 KB Created: 2021-07-26 03:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bcaee1f11045ee83f9a76b9ac0cb8454 SHA-1: 0b0ea86c01f269618b96a349d8b1165e2f87bcb4 SHA-256: 0c2d4fc876d2dd902156d8188d9f82a544b4c9d9929a2d623838c5daa5469d4c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to other PDF files hosted on various domains, some of which appear to be compromised CMS uploads. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics suggests a deliberate effort to manipulate search engine results or distribute content through a network of disposable sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://josephlillianmorrisfamily.com/clients/59960/File/jakurovuwuromasan.pdf In PDF document text
    • http://rghsalumni.com/clients/82979/File/8187322580.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/tloubc0po8iq7fbpq2utted1j5/2001206225.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/tiropebexafovanemajubu.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/160735b931b78b---15318214367.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/litozetibivutamulugonoba.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/gitujitoxesulatifuwakome.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/32131848d6f1a713d467b8f006f495a4/98526604448.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/61895243640.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/1aff6c486159f22f03e11cfc72968ae9/22059801688.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/82406a06f41747308960e8f3f13fc4f2/senuneleg.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/8191531605.pdfIn PDF document text
    • http://whatdwellswithin.com/file/86613526216.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/lisizuruwo.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc13e95780---mamurimetowu.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/39339997602.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/misoboxegobasew.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/tb8jss9ticaflf8occd0g3tf88/sujaxetemoxanis.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/9258263313.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef767f3655---80225294402.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/1673ecfb6e9b953db7c8685418d3a22a/29038192682.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8fh56h1o50gfgfbrfs2lb5et3g/zorizanod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+workout+chest+without+using+shouldersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 16676 bytes
SHA-256: 77b259f7e5f0679b7a183c70e956fc730333a1245e8ee9c191c09f3b810c4d3e
font_01_sfnt_off00011bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFB 10756 bytes
SHA-256: ee1b26f4942289d1ed4d75f6ca19cd0313c6e539d9a15fa37e91a179b1785829
font_02_sfnt_off0001347e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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