Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b2588813654644…

MALICIOUS

PDF

94.1 KB Created: 2021-06-27 22:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60db654b85a7e22b33269bdfaf879da7 SHA-1: d0410c27570c207f35e39207bae1d91db546f6bd SHA-256: c5b2588813654644561d43e0f582cb4f909af255565ad6340b5059a1ea8e19c5
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by an ML classifier as malicious and contains embedded JavaScript. The document's structure and heuristics indicate it is part of an advance-fee scam, likely attempting to trick the user into downloading further malicious content or providing sensitive information. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common component in such attacks for executing malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/96432caf13a2932a9ff291a996dd6be1/vunewutadomajod.pdf
    • http://aitrans.org/UploadFile/file/F1202106021423305871.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d68962382f---gukefuwulimopijejofas.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072767bd8a07---66581998038.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/cf170a13b80a4da18d49eea9e0856eda/rowebipogitez.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c72cbd594---21108957831.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3849d1a8e3---81327713639.pdf
    • http://www.jacenter.org/js/ckfinder/userfiles/files/49454181401.pdf
    • http://drironcat.com/images/file/fojozasomawavotowomage.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e04d76466b---86053842534.pdf
    • http://iltorg.ru/upload/file/viborafagifagup.pdf
    • https://morabia.fi/images/file/75163879728.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/ecf02eb836b82577205588a7bf5b21b2/97987414246.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e47503deee1211d9781c7d0fcdd16a06/magelisefowasidufodiruv.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/ffedc67f8eb007cf666551a5cd51f840/nuteju.pdf
    • http://mmbc.cz/_data/user_files/file/56340085252.pdf
    • http://sumbulefendiegitimvakfi.com/resimler/files/69206612598.pdf
    • https://charterboatdeliverance.com/uploads/files/73103458551.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/5ucr77sdjb9oaa2a6ggtn7ur1l/sesavege.pdf
    • http://jncs.kr/page_data/file/20210530070201.pdf
    • http://sportgalaktik.sk/userfiles/file/27801438446.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c090576dee---pusoguwaretodagopane.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/9qukm5jiscggt5tfnatuphnmid/49070053299.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=audit+in+english
    • 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_off0001107e.bin
b920313548d86e881a7123c92ad14fd362df4a4a775504f187dad66fb3ec1975
pdf-font-stream PDF embedded font (sfnt) at offset 0x1107E 16972 bytes
font_01_sfnt_off00013cd9.bin
aef7be921d56fc50d5b58f013ac8cd191a78167edf8ec54b8e88d4893d0f3681
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD9 10224 bytes
font_02_sfnt_off0001537e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1537E 16792 bytes