Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2eed0c722003805…

MALICIOUS

PDF

94.3 KB Created: 2021-06-27 22:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f50e7bf75cbac13afba38ae2b2b1da54 SHA-1: dff20c49b2767ef1811fbb4e5771d68ba3809793 SHA-256: f2eed0c72200380538b93072ead12e4fab3663f873dbbbd6d40b762a19529ac6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised WordPress sites and other domains, indicating it functions as a link farm. The ML classifier strongly suggests malicious intent, likely to redirect users to phishing pages or download further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 5

  • 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://coretry.ru/uplcv?utm_term=backswimmer+life+cycle
    • http://vimar.ua/userfiles/files/60797077472.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5db7c2f542---danomadegimusasowugurexi.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/eekk0rnos6ab1f3o1moiedcav7/26062384098.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e805357c41---forirufetid.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a88e458df6b---texasesikizefo.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/5222bd74c82cc1531e3ed1a506549f7f/86820758436.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/803409f5c69dd01942d719151ed7a847/mexidemum.pdf
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rexofowozudagod.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4b7f26c94---24149320195.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/a998ba7f67593ab88963a460b3f07dd0/ririviv.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160744a9716c48---wovibinigogesiwo.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097c08dd88fb---biwinamadeva.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d587ca9c84---xasolopupejufoxo.pdf
    • https://wodepcb.cn/uploadfiles/files/pasubiwarotodofojagajamod.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16072dc9986bdd---kibiwipagok.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c921967930f---16294347214.pdf
    • http://assessmentinsight.com/ckfinder/userfiles/files/nedotavexuvedefimol.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f5bc0bc97---bovivavifu.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f607764d2---39918539537.pdf
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/89940634019.pdf
    • http://artospace.com/pics/file/gefumexasujilawa.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/9c18df69d31befc033b3302813e86c42/dulabam.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/tif9o4bfvuj7e2iq93vf0r93q2/93719773624.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b268515ba---jigop.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/8757420766.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E7 16792 bytes
font_01_sfnt_off000110f8.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110F8 16252 bytes
font_02_sfnt_off000126d9.bin
8589f412248b397eb9ad33a0ece6e10d544dd9a09ee84604ebda4245d46a87f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126D9 10520 bytes
font_03_sfnt_off00013ee4.bin
d55d94e86387da99d5fbf20edf5f6f62656c51e83f5f17edff442bb8516dc446		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE4 17060 bytes

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