Malicious PDF — malware analysis report

Static analysis result for SHA-256 071ea697c9787364…

MALICIOUS

PDF

98.1 KB Created: 2021-08-15 14:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57040ce320793d19761d9d78c7f6010f SHA-1: 710d55b02b1901b382be4a458cbde0a1a203b158 SHA-256: 071ea697c9787364157d93416618d4242f84ffc9ae96b3d75b28d8fae1ca6879
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The 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 pointing to compromised WordPress uploads and other disposable hosting, suggesting it's used to distribute phishing content or malware. Although no scripts were explicitly extracted, the nature of the links and the PDF format itself often leverage embedded JavaScript for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://duext.com/wp-content/plugins/super-forms/uploads/php/files/afb4763b91f8906f5b6064a1ddffe66f/90786455284.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e793e5ad981d5cae1a109cf0b89ef01b/sixuwogudeladedutose.pdf
    • http://afghansolar.com/userfiles/file/14083100463.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f82559df01---36851711648.pdf
    • http://omonetach.pl/foto/ilustracje/file/71421878518.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/9534fd2e096001779bf79b1a603e113f/xagemiw.pdf
    • https://rh-h1tapi-turbo.com/contents//files/81342870124.pdf
    • http://studioassociatoemc.com/userfiles/files/22876837144.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082e56a14405---dinogadunukubutawofix.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/84151bc6698aa7ba07b6e904d2c9c2b3/43588211391.pdf
    • http://dges.in/userfiles/file/bunezijolixuzedap.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/2b1d4158bcf571d3cae12fd1ff5472cb/bunulejelenobugeru.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/baf3ed0977c02675ab984d786b86876f/rokotawudinopezovigobeveg.pdf
    • http://ash-graphy.com/userfiles/file/sowadirozodokowofogixodiz.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a66a822bb4f---83183484495.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa503c1d16---voboxewowexejagenufoz.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784c9d9a51a---44627378700.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/cef18d4bc399af3a19bc76de3b604ee5/63307210083.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/bd4fe3f8f1d78f11252e6a9ea7c1188a/54812106815.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b2d412847---78083519501.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794b820271a---38282454069.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/a5ec6af0290cdc142d146c1d5fc6a954/mipigepigopolireniw.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609046b1e6c3b---11814218788.pdf
    • http://opuspointpartner.com/ckfinder/userfiles/files/kijere.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+adjust+g+shock+g-7900
    • 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_off000116b7.bin
f046cc325913d977f9cab2e68236d60cae9bae285fb6eda85166f72efee8ad47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116B7 17964 bytes
font_01_sfnt_off0001465b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1465B 16792 bytes
font_02_sfnt_off00015e72.bin
f006b23629bc57a63654dcbd2ae26bff7a968e1a010b4b4c0538ca504b4af390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E72 10948 bytes

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