Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed75c6ffdedc7064…

MALICIOUS

PDF

80.6 KB Created: 2021-06-26 19:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 206d94ea3a6c6f5ef83fb27c7aca77f9 SHA-1: fa2a19a6564a3bd13c17bc886cb074b898518811 SHA-256: ed75c6ffdedc706433797182b30e5979c16eebe0a09ff8dfe19fe6c56db50010
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The heuristics reveal it functions as a link farm, hosting numerous PDFs on compromised WordPress sites. These links are likely intended to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://nsck-cykelmotion.dk/userfiles/file/xofevekon.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1234b719d8---mosapujavom.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/e0af5b8cafa6a4c9a53d7c824e8811de/64071178752.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/388d9a77165604ab8a90fb78c3fbf524/11526875740.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ec4112747---rujowikivisuvemunexogi.pdf
    • http://byty-pardubice.eu/UserFiles/File/68631282949.pdf
    • https://charterboatdeliverance.com/uploads/files/rajegajuforuzodogamebi.pdf
    • https://actor-conseil.com/files/file/45683827765.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa262d4dc04---19194731609.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/95f567eccb8fca99fe1a03e4cf3ef292/vevizipuzijogajafuwalisez.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a253a7c3d02---97771056645.pdf
    • http://adria-ex.com/images/blog//file/noluvobeb.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/007g9n4oepcn9aeho57lgvoio4/rigiz.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160734223019fd---gevimunomabamitusugizoxuw.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b30678a0d29---zavotovuxika.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78cb04e547---netegifujuniboxaxugese.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/np1lh7ssvqvbd9ta2arjeq7tkm/84752887930.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079aefdc7325---tuwipemapekawiwexadamo.pdf
    • http://royalgoodviewresort.com/Uploads/file/tinibenokoneji.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aea3a77aada---maxepikipexedevizuxam.pdf
    • https://altbuket.ru/files/77659737835.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/c04866a1b3ce91f115f416c638924dd8/robazepefew.pdf
    • http://apluskleaning.com/admin/images/file/23648569125.pdf
    • http://beerskiboot.com/img/upload/file/15052269275.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/8c5bd7e953f10be2aae85a8a20a4646f/werifurututunebit.pdf
    • https://ebooksweb.net/files/file/kerejipivumolikufazezuv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=median+property+of+triangle
    • 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_off0000d76b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD76B 16792 bytes
font_01_sfnt_off0000ef7d.bin
64285ff18e45d37379e9b23f78af90e51f91924ec3bbffe2898e0c29911cdcd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7D 16752 bytes
font_02_sfnt_off00011b5c.bin
f2553459b165549d4039081c388a16692596801e2e525f7fb75914c187f5c81c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5C 10612 bytes

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