Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d8e3e00d2f9a38…

MALICIOUS

PDF

76.6 KB Created: 2021-07-06 17:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 500ae3bed09bc2655c7d02ace14edf45 SHA-1: 467acc0ca3953cb9c25c02c6194c20ef31400986 SHA-256: 30d8e3e00d2f9a38318bc1929f7d678719b7cae32949c904caf0f4ddadf5702c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains, likely for phishing or malware distribution. The presence of external URIs and the structure of the PDF suggest it is designed to exploit user trust by leading them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=solid+6141+pro+price
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/4hdnvbdi90n8lqcrgti89kpmf9/36330847943.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/3j3lpcad2pkqru32vq7ln93gd2/60195635030.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/a6c1eedc8c9467ec6fc0a74a283079d1/defoxibi.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ljeaq6jik9i88nvhqecltcq3d2/36936197382.pdf
    • http://alltechsro.cz/files/sabidotebixawu.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04512826f7---dibudugij.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdcc90a6b0---bixobewego.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/b8ed8bf996aa89815306c8c161492022/71707177624.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/h94vlnvd63j0pgjelfat7uk1or/74579133524.pdf
    • http://byecook.com/ckupload/files/fudojej.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926c08e61fc---nadevumupeloduwanamon.pdf
    • https://capital-tic.com/upload/ckfinder_temp/files/20210528232633.pdf
    • http://thedreams.cz/files/zizifewamurobekimopivub.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/7ca5c7821f3249f14a7d6b5f1b55a088/1546531189.pdf
    • https://davaocarrental.com/images/file/lanevuvoxajikewidodije.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bc78b12a9---mofexewozul.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/oqg65ftgct71v5m8icie56qr8m/99100536627.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc49968f2f---dologubotoso.pdf
    • http://ebsenglish.net/_UploadFile/Images/file/jazonematugowatugemozi.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/eiqshb9h77af2qejnal09l9srl/kelabojerulad.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17443cd7a9---45782035488.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dcbb659406e---ralajazigojo.pdf
    • https://tanthuantelecom.com/upload/fck/file/90629254507.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/1baa4376b468a67e812c9f9766bda86a/14800031317.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c67e16e63---96074822739.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/26440955618.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCACA 16792 bytes
font_01_sfnt_off0000e2dc.bin
ee1d2db05555162959ef65006d43fa76aa3cb863476134bb2918715fbadfa7f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DC 16536 bytes
font_02_sfnt_off00010dfc.bin
94adb9c33619dcbc600e451a9399e5c1c00bb87bd4280ea6a384efb70cb9d0d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFC 10348 bytes