Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f078b6c20a42a5d…

MALICIOUS

PDF

148.4 KB Created: 2021-09-06 16:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 34c364af8c27fbfdd36864bd422a3e99 SHA-1: 201396a3519d0720fa15ea03bba5404490306017 SHA-256: 1f078b6c20a42a5d945fe84683988758044a9902319132c4a368e3dbbf9676bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, a common tactic for phishing or malware distribution. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest this document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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://oklogistic.lv/upload/file/69003546194.pdf In PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/9155678549.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af316ac15ca---wopajuwivab.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606f425976417---85802148971.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/pegog.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/c078d84d1f875bef2367cfd973c60f26/vureduvexuzozuwebade.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/41672036473.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6c0b982571fbd6cb591c51744859f356/navepurofexigam.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/vedetukisirefuzevetalimiz.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/tezasezodanafafopirebim.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/29878073671.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099fdb531c11---peluwimuvi.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/domige.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/4880384611.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/86927277992.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/77680295923.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/34340432211.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b7545a0894e---kusadopiviwesuzalanipo.pdfIn PDF document text
    • http://viettranslators.com/webroot/img/files/60979919641.pdfIn PDF document text
    • http://weymouthhighschool1960.com/clients/9/96/9679770cb43d952edac6f872f7aef95c/File/36632203731.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/2bft06u0dequ5sj3qnvlpands4/gukafibi.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/257807biguqk8l7kpl9tjjir81/simulonedovobamirox.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d30127063---80120956459.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=causes+et+consequences+de+la+deuxieme+guerre+mondiale+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDB2 24740 bytes
SHA-256: 5f32c63c6a923c9122610773b4223ec6e1c37a17e15432b7b2bb678d4eb10a9c
font_01_sfnt_off0001fabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FABD 11340 bytes
SHA-256: 9df5255966fe9321310b5e70a744113971dcba92ef95a5b1888071dec65b3416
font_02_sfnt_off000214e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x214E8 16164 bytes
SHA-256: a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1
font_03_sfnt_off00022a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22A8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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