Malicious PDF — malware analysis report

Static analysis result for SHA-256 79614267dd1c9a78…

MALICIOUS

PDF

93.1 KB Created: 2021-09-06 18:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8d922cd0e7e610a0c5dd25f5080c343d SHA-1: 039538ea0bc895a834c641097007ed500f6115d8 SHA-256: 79614267dd1c9a787280e25ecaf6a4025222e1bdea5be81fedf2f276db4c840e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a155c355d24---83747926278.pdf In PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/86137986132.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df41034f14---28424216370.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/nexawexusinimafuvuguzux.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/gebonurofuvix.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/f8rcfn89bjg8dlrempm6qr345f/zuribidokag.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82b5794fe7---kivixuf.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4994b5ff9---mefezakitawimofosebereto.pdfIn PDF document text
    • https://qfse.co/images/uploaded_files/ckfinder/files/1629833651_336350db15.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/33727599523.pdfIn PDF document text
    • http://nacnsuaa.com/clients/4/49/49ab1acc6c62b5a39110d621a19f71c0/File/nazorupamegijilo.pdfIn PDF document text
    • http://runningrhinelanderrabbitry.com/clients/875187/File/36822458513.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/57102137989.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/7353d9162ad3f29afe372ee1bcef9362/4195247187.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/83342430078.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/32006179040.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/faginewudedapifuke.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db80990cb19---14723081380.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/af9533f6f02dcfbe2494de25bbf23d20/13274384619.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/67267028945.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/q006rcbcc76d4o0lvl74lqsrna/gamuvi.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/semunerifusazudul.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/ratelegupipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=kaantasan+ng+pang+uri+worksheet+grade+7PDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 18424 bytes
SHA-256: 08d9348459605e5736aa35939be11522edef3bf322bde5c9a4fa19bcd3ddf219
font_01_sfnt_off00011a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001322b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322B 10944 bytes
SHA-256: ad3505da88e76f9e614b9c5350d4e206eb2f67cfafd113ccecb495c0ce6df5fc
font_03_sfnt_off00014b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B64 17840 bytes
SHA-256: 5d40346fe1f32ef22d9f03e28cff4f147a2366e151ca4e0e636339c473c975bd

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