Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a0e38a4ad22b7d…

MALICIOUS

PDF

100.3 KB Created: 2021-06-28 10:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4c3f2b1cd9d4e7815f9ec621ad4cfa6c SHA-1: 1b3130296235d30babba14f7897b43f3cb938f04 SHA-256: 92a0e38a4ad22b7d3c5dedbb60b4f03437121433f671ef107f6338a8c0877006
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution attempt. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an effort to obscure the ultimate destination or to leverage compromised infrastructure. The presence of these links strongly suggests the intent is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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 http://logo4you.dk/userfiles/file/85940375750.pdf In PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3185c9e8a---tomerofusilarepoxudefe.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/eavjef6asfnehc8ret8d30mcm6/wagugudifujosuzedut.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/92590325003.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/16fc1dea2e3f641d21d25ae783103ed1/28496436612.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c62062d5a0---mopupegiren.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160805bc92a103---59828248859.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4434b871e---13116774233.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/31783120490.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/i5srmcv2kko1ah82o3b5eck9gb/56885657757.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aced9d81bc0---12935170055.pdfIn PDF document text
    • https://luminex.pl/upload/file/95439772814.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5a6446fe1---24767136729.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/79936058587.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/9add59097b7e03516bc5f921e0ce24a4/pevejizopujulefibukod.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/nalakagozodegenezewejejus.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863c65e256c---nakinil.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f59b68fff---6595064731.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/megojeb.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/81h6b7bfmhsnip4hscfjm0a5b2/pitipafesemejugox.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/b0a03212acf4762c79f1c4f884337f9b/17630427127.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/22463cedb71f34de4a8175c9e6377e2b/11458108713.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef794763b1---96296526782.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608353c68c695---85057949938.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/xibomoxixanodijetodopeg.pdfIn PDF document text
    • https://kaptenhoki.com/contents//files/ziloxilawor.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/tb3qa9n5rfuqjmrhsqi6589q95/54078847343.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=one+effect+of+global+warming+is+drought+and+desertificationPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001257b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D92 11272 bytes
SHA-256: 7854068064e7bf752d4761cb4df630d0ab048152dec1734b73d4389f9bf37b60
font_02_sfnt_off000157c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157C1 16704 bytes
SHA-256: e565601ab7d86373d1711fb2397349c9b7ebd88cda36dbba67c60cc81f2dd3d8

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