Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2fb27a31024a2d…

MALICIOUS

PDF

85.4 KB Created: 2021-09-02 11:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e362745b3a2e9014514f8845a2603dc0 SHA-1: 325d6bee8e8d9db53d787767072acbc075435bff SHA-256: ab2fb27a31024a2d6ef421fc20f384c12da208a4b4810cfadf9869552224335d
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The heuristic 'SE_INVOICE_LURE' further indicates a social engineering pretext. The embedded JavaScript likely facilitates the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pixomot.ru/uplcv?utm_term=business+loan+project+report+pdf PDF link annotation
    • https://unosms.us/userfiles/file/zojuwemogalasimuzuzo.pdfIn PDF document text
    • http://discoverthesky.it/file/fukutabenofatomezijujenir.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd5c2370fa---kebudevalejowapi.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/tomoredumusasumov.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/26955082733.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1479b0ee6---xulatakema.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ca02ee668---watotukaz.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/15145889725.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/vokodadodadus.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31a93741ef---junutaziwi.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/jusawevanubopuziwojuna.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/h4gdp23n70b34m2aa1j7sleua4/26978536584.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/5319099382.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/pufipavali.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00576bb621---dipozopawewudi.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/da436c3bc042a5f30e760f153d2e4c5e/kokivuki.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/95386392915.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a875b35f1---63238325593.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/71162219286.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/61657260471.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/tumazivinodugijuvuk.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/39777950591.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/52207739603.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/3474664054.pdfIn PDF document text
    • 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_off0000e806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE806 10896 bytes
SHA-256: ba9e2b36f231ba5ad5edb1629e8b5f00bf2e1a6ae62f9aaa8f6b154860c54dbc
font_01_sfnt_off0001015d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015D 17956 bytes
SHA-256: 353229580dcd5d67eabbbd5b22fab4a8b362cda028ed479f56d52cafe2b16ad7
font_02_sfnt_off00013001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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