Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6146060d88d62c…

MALICIOUS

PDF

70.6 KB Created: 2021-09-28 17:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1a1240311de62ab7cdba8179026aaeb3 SHA-1: 37461dce6565e2a5a941c5d00dc7039efa740fbe SHA-256: 1e6146060d88d62cb8db3f5a3e4509a10ae83706e89220ccc003b84053e739e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan distribution vehicle. It contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly indicate an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://allytemp.ru/uplcv?utm_term=online+video+calling+chat+omegle PDF link annotation
    • http://siblom.ru/files/upload/file/55517552229.pdfIn PDF document text
    • https://beruanglucu.com/contents/files/vofazowameneba.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/lojeti.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/64146598536.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fusuzikujakuserori.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021090515151_579074190.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jolakazejinegalof.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/92718617191.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/32629427413.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/dcb5ffb6f7fc776a0dabf2358f42d8f2/20060903851.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161461b464e68d---80318538934.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/vulurala.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/julekikukixedemaxazova.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/bebaluzazopasapupemufe.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/sebikive.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f082b4b970---katabobenusoxevok.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/85967783822.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/gewetuzatoworekifopemez.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/442f13da0b79310c6b7d4a65914e3ad9/dodolexizekiz.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16142e8267c224---ferowumajimejaf.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/fixarigovegiwuxixon.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/22111705238.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/bowiwixas.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_off0000b0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F5 10640 bytes
SHA-256: 4c9f61440bbadd2c24c66d3ab8d4a51e28531fe59d1fd58143db88188f89de6f
font_02_sfnt_off0000e0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 16660 bytes
SHA-256: f36e5ab44bda50511672a1216ffb0642045a9b901519932d9749be59fddff9e9

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