Malicious PDF — malware analysis report

Static analysis result for SHA-256 e116423cc92496ac…

MALICIOUS

PDF

71.2 KB Created: 2021-09-14 22:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: baebcaeca656e2f0a76bdde16aaeaf83 SHA-1: 014580c57f5057410e4716bc308bb9c0140fa349 SHA-256: e116423cc92496acca2ad5249b6eeb6f065d00362acc50409f977cfc2b01c1b3
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these link farms and the nature of the URLs indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://a1climbing.com/userfiles/files/49295871749.pdf In PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/86703886132.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/jikotawipetipazuv.pdfIn PDF document text
    • http://ipublicity.cz/data/file/jifozewarobowunobokizok.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136800a8c193---temiwovuwikakubojekupego.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/91232499979.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/16835127061.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/45986ecdb6d2808102335fd3f4ee8a2d/43605918525.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/zemuginomibuj.pdfIn PDF document text
    • http://greensquares.in/userfiles/file///wuxovuwajonakenome.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/93601825325.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/2086421346.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/fonijileru.pdfIn PDF document text
    • http://koutingchina.com/upload/files/mobizojediwiget.pdfIn PDF document text
    • http://dymenahealthcare.com/upload/fckeditor/file/11623981287.pdfIn PDF document text
    • http://sasalidayanisma.org/uploads/file/436040624.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/wupupazugalinudosazaz.pdfIn PDF document text
    • https://vilus.cz/userfiles/file/pimijonejenarazufer.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d63b27e79---xetakojawusevufeb.pdfIn PDF document text
    • http://isvpro.com/custom/files/bibajedutomul.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/83199062231.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133da1776b58---jeramaxekapem.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339d83326d7---zebaduxapisil.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137df8c74496---86117926812.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=mini+militia+sniper+rain+modPDF 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_off0000b50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB50C 16116 bytes
SHA-256: 043281fb7e6705b32b6b19811422343e94834e1d8eabbcc050be56bc0c6af0b7
font_01_sfnt_off0000dedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDD 10544 bytes
SHA-256: 916e3bc0cfa14e351cf49f913990b393432e6bc9fff261e1dc1bef1276e5d6b9
font_02_sfnt_off0000f6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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