Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ceef71e23b2482…

MALICIOUS

PDF

90.7 KB Created: 2021-07-05 23:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4e2a467982762d8f18976af8936fb736 SHA-1: a6c03f000b83281a3e6784db0d3add8be44a3ef6 SHA-256: d6ceef71e23b2482da199604093584203079076246bb6cc2ed47e08ca6f8405b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a link farm pointing to compromised WordPress upload storage suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://bomtvplus.com/data/board/file/20210609211236.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc738c1b5e8---natesixidoravukenidanari.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786246cce14---38731097982.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815c5300fd8---27703110413.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/e4f425f5051e3e18c6fe0b83ff9863b8/zikonubewujiv.pdf
    • http://dansensvenner.dk/imagesfile///11897097302.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825b59e0cfc---selor.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/c43c4dddd813c1cd7d21a775517cc2e2/dupidibanexonogeziki.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/s0dgblvsiemva1kh7r78h2n6df/51406618207.pdf
    • http://apsara.ru/userfiles/file/kakavivuxodapojibekej.pdf
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/4jecp8t4i320h0v8jr3a1ccvl0/46723578539.pdf
    • http://dynamic1984.com/user_file/file/riwulufedez.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2444992ad---lolutadetezexoragi.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160970d5936196---bivitasadowukeforej.pdf
    • http://northcity.rs/slike/files/busitup.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/3470673be234aa78b149af4b797fda02/31030413594.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086c6431f332---tapifitigupepojujilekam.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/fafcd0af0d55c40fc6cd1f3449e6b0e5/43766879713.pdf
    • http://daedukgs.com/admin/fckeditor/data/file/20210606034519.pdf
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/gozopo.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cced6d0f1d---68659548613.pdf
    • http://adabaskimerkezi.com/upload/file/vewixikuwisukivejodu.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/78fd4dd7dff456de046fb9a2311bfc9e/57421842092.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/fla4gesm66qqlsitfpgtbe0t4t/tafetexesa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=the+galapagos+islands+are+off+the+coast+of
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/60a265ae04228b5d7533d931f40fa57d/segagunifepi.pdf
    • 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_off0000ff8b.bin
f3d0dc2a990afb5c5885249c27daa696c772b5c54f15fe2f4f17d753dcf07c76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8B 17328 bytes
font_01_sfnt_off00012c53.bin
3dd028e69e5a7ec348bd80e185c3169678176afc4c93eda14fce1d62acceb048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C53 10864 bytes
font_02_sfnt_off0001452f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1452F 16792 bytes

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