Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bac673c2208e8d…

MALICIOUS

PDF

86.3 KB Created: 2021-07-03 00:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6e51c501654af2be35cf6f8927870b6c SHA-1: 11bf68e35a963f9d8d4d612b474c3430a2744964 SHA-256: 65bac673c2208e8d067f470ec2cdc32936f4c6c18dd08c7b3bf8adf98cce5609
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress sites and other disposable hosting, consistent with an advance-fee scam lure. The document body is unreadable, but the presence of numerous external links suggests the primary function is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/7mtmp3fmib33bo92ds1h7r92lo/75975188583.pdf
    • http://goteneplast.se/files/images/file/55697460543.pdf
    • http://eurekaelearning.com/upload/news/file/zipegulisobil.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/a5dd517994be9a319bfe41da6317b5d6/kizagomozirifemiked.pdf
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ad4d50911---85746696930.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/h9u14tdh0rn0333skg9sihe9vk/buzeginitofapef.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d3bf5bac3---70628859334.pdf
    • https://sharadsangam.org/UserFilesTwo/file/xafefufotumipulaxazerison.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089ad128cf80---wuvixeno.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160923831ab78f---23652236651.pdf
    • http://cayxaotamphan.net/userfiles/image/file/pufokamexit.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fca978d08---55500590566.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/ec2be8af5cf2723f9a69c340dd16a8a3/30792472819.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/122b6b656e6897cb568ca976c7c68d9b/telojemutef.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7206dabf63---nipox.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/977552c1788e3975e0e242747939d8fa/zilupefajofajam.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/f62096f6f7f75195891e163df56d07c3/doxikimufesozi.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/olo7cpmmfn08d0pcitm0j77kd6/fifoxusofipumojofaku.pdf
    • https://malabarmail.com/ckfinder/userfiles/files/24137300832.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a444f5c571c---zamonutum.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/409d13e5c721503ddb640698f5f4ee20/89127526439.pdf
    • http://madveras.com/ckfinder/userfiles/files/5967184943.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/r2gft3o9iig0koiiel84a6tst2/nokewus.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=real+time+investing+commodity
    • 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_off0000ec4c.bin
7c8774937b42cee81fd9d6f6e457677a5de6cb49d8275763924adb66de23821b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4C 17816 bytes
font_01_sfnt_off00011b3d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3D 16792 bytes
font_02_sfnt_off00013354.bin
441ad088a88650b2408c0c4e4bd5bbec4e8fa6379ece8328b2e3d9264d8d1a6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13354 10836 bytes