Malicious PDF — malware analysis report

Static analysis result for SHA-256 7104984327e164c0…

MALICIOUS

PDF

77.7 KB Created: 2021-09-01 14:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5dd507c519997f4560b238e8115b985a SHA-1: 350e4cf6411d0a479d2ee6742bf41eab2cbb5615 SHA-256: 7104984327e164c0df9679149451100d3c47571c6490ca35aa2e321b6250aeac
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate the document functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting. The primary goal appears to be directing users to malicious content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://mimpisiluman.com/contents//files/6642592045.pdf In PDF document text
    • http://www.sudaff.com/pics/file/kotuzogofudaxuf.pdfIn PDF document text
    • http://nurugelexport.com/ckfinder/userfiles/files/jubivoruzupitozod.pdfIn PDF document text
    • http://arslanemlak.com/E/file/71894642717.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/58357991098.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/laxarebezotosedas.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16071fcf1a6cf2---4868918936.pdfIn PDF document text
    • http://balone.net/_upload/file///80677377243.pdfIn PDF document text
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/lonozedojifexafid.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160956e8c0b869---gupupunitujanapuwazi.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/82055619459.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/f43b5c738b871913fdc7d6cfa4191b48/somerizi.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/bekirajepisikizarokeremiw.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/50118134993.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/piwunusa.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61b855f6a3---19166588327.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bomikosowe.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/63ff9037f14a5dd46c1328eb0c329c4e/weletitedatuxusepodumoxe.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160e13d556f7b7---76203343515.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/68363971867.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea2a10fc80---pemixofedadujuwubuvu.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/jotonerozukutufolo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=murray+arms+hotel+orkneyPDF 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_off0000cc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC04 17640 bytes
SHA-256: 2d7379414c7afc3f2c1a8349adde87e6156ba2f1159ecaf153a4b5b4a2d72ce4
font_01_sfnt_off0000f99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B2 10580 bytes
SHA-256: 9e456e100f549fd8bd26c65109b5328b54313ff2ac49aefa0aa8200c0c5211ad

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