Malicious PDF — malware analysis report

Static analysis result for SHA-256 47933839bb3f19d3…

MALICIOUS

PDF

79.7 KB Created: 2021-09-15 20:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: df7faf13b2360004f3b03ac624283512 SHA-1: bbb314d69e8c21bcdffddd6844cd0ad1b6d6d6ea SHA-256: 47933839bb3f19d30fa0fe4e75054b68a1d99b593e62778b204c4bfbb4abe6d7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with numerous URLs pointing to potentially compromised or disposable domains, designed to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the nature of the link farm and the PDF structure suggest it's part of a phishing campaign, likely involving embedded JavaScript for redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://sinice-rasy.cz/files/file/jorusuv.pdf In PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/fixinuxofewujosopirubexox.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/sigilemibarariverefoku.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/jixupolipufolijozomegokax.pdfIn PDF document text
    • https://gangnampools.com/contents/files/mumaboredebupotetekabusux.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/94300725054.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/pjqcn9ru8kioa98003tj7s00bk/57257246740.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109120227502744.pdfIn PDF document text
    • https://gestionarival.com/userfiles/file/1495069766.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/terofarazej.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210911072919_OTUwMzU0NDcxNzI=.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321a91944a9---92465922652.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/94048966658.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/nixopud.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/90614580671.pdfIn PDF document text
    • https://31app.com/userfiles/file/86878585257.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/numet.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/59257662107.pdfIn PDF document text
    • http://ccsl.asia/files/64919973608.pdfIn PDF document text
    • http://baoveantam.info/upload/files/52616305503.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/kudipovitoniwewo.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/441cd4dba5a48c2d11afef4877a8d36e/rijaduxifubibezuzitoti.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/vivunupumodevitedejatap.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/35246812831.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=firefox+browser+for+android+tvPDF 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_off0000d20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20F 17980 bytes
SHA-256: b5ca2f541917e4173da2ddffbc06d3bdda8ce1912532f5e08786c862a2fdd4e8
font_01_sfnt_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 10672 bytes
SHA-256: bbf89d060969538387e4dadbc0e754ad014c0cc9a3af2a1bcdaff29fab6285be
font_02_sfnt_off0001192b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.