Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0fb9a3f16435cd…

MALICIOUS

PDF

111.3 KB Created: 2021-07-13 15:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8aedccfb0d3813fb45af7252f04ac03b SHA-1: b3bbda32eaad07e99af70d57805747f5e1ed78f0 SHA-256: da0fb9a3f16435cd74dc8ab33c39661a1cf656e5235b7be0ee281ad1d775dbc5
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. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of external URIs and compromised CMS upload links indicates an attempt to redirect the user to malicious content. No scripts were extracted, but the overall structure and URL findings point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886ed46d9aa---renusazilarofuxemabejav.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1df1b02e3---saxokojupukepaleganox.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b049eb7a662a02a8944c9bb1310ab1a7/gifimoridagaxovugub.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/936bfed7850357b10e7e5a280007a93b/mizisudekolovo.pdf
    • https://festival.bg/fckeditorfiles/file/saxuso.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160781cbfb5d1b---45054599392.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/c6e679855ff83dc3546fdb79a43e046a/fenubodugisuv.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/f5c95c4ba99beca7a7e0dbc880db6387/22167080157.pdf
    • http://zonwering-belgie.com/ckfinder/userfiles/files/nolotuborotowepeg.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989f6de2f50---24807043592.pdf
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/gomanomifami.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/89d6af2f4eb33755c902967cb8795781/49261847977.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/622ea74fc1f1620f2bc9616e8b6f4119/25273372893.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/0648a7773ccafc4343f14ccf75e1e433/15477949751.pdf
    • https://wegofa.com/userfiles/file/zoraripijokufuxewejakeki.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/e43ed334142141dc90e484638d203478/62299856579.pdf
    • http://thessalonikiflights.com/files/files/rezodewab.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086535ec7ae2---8748310397.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c9e336860---4988789735.pdf
    • http://wadirumshootingstars.com/userfiles/file///66326819779.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add219d3b2b---75185524148.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e892b99220---673209629.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c25e1bd29d---69448467736.pdf
    • http://ferramentabelleggia.it/public/file/titegejejofef.pdf
    • http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/65759058596.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+hypnotize+a+girl+over+text
    • 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_off000150c2.bin
f251a608f0a657c007e7b75c2f1105367d54817a95ccaa72b656d55a2e878693
pdf-font-stream PDF embedded font (sfnt) at offset 0x150C2 17588 bytes
font_01_sfnt_off00017ef3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17EF3 16792 bytes
font_02_sfnt_off0001970a.bin
6640de40f30b9d5ff154e548509b64761488a337e8fc47648316af86ef4ba0ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x1970A 10780 bytes