Malicious PDF — malware analysis report

Static analysis result for SHA-256 0471e43f53e12b09…

MALICIOUS

PDF

96.6 KB Created: 2020-11-18 11:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0431b36566c26b150068e2bcdcdb071e SHA-1: 52e5e6fee5138e6ab6e557f6b419596c97637bb2 SHA-256: 0471e43f53e12b09bd27a80ad80be47388ee56cf59068478b12e2b7442321146
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. This suggests the document is designed to direct users to malicious websites, potentially for phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=third+zone+laboratories
    • https://ropejanetim.weebly.com/uploads/1/3/4/6/134600341/94c4c4ccd.pdf
    • https://cdn-cms.f-static.net/uploads/4470972/normal_5faff5c01826a.pdf
    • https://mizitixas.weebly.com/uploads/1/3/4/5/134589849/dunis.pdf
    • https://cdn-cms.f-static.net/uploads/4427821/normal_5fa23f8ad74ef.pdf
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/naxuwupak_pexoveguza_fizudas_jazalalam.pdf
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/2b89efe1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wiwuxot/71479505825.pdf
    • https://s3.amazonaws.com/foneniz/tafsir_al_quran_dan_terjemahan.pdf
    • https://uploads.strikinglycdn.com/files/a625dffe-1296-4863-977d-38763e0372b3/24470382812.pdf
    • https://s3.amazonaws.com/jijumupade/15225745370.pdf
    • https://s3.amazonaws.com/ratixifo/amulet_download.pdf
    • https://s3.amazonaws.com/nazekisigiduz/zasogunodukosasivumom.pdf
    • https://s3.amazonaws.com/wibedubosateg/gta_v_free_mobile.pdf
    • https://uploads.strikinglycdn.com/files/e1ad4d60-c03c-4f96-a519-4abda2650af7/36910920426.pdf
    • https://uploads.strikinglycdn.com/files/d542e938-09dd-425a-80ef-3474ceae6b1a/norirufo.pdf
    • https://uploads.strikinglycdn.com/files/c30ff419-c91d-48a2-8086-ace621445c26/gamoroxowuwilimamabo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f98.bin
c6c9e2e7ef32f1ce51e1429f4673232dce5edcc03088b06db08ff7f97775ea27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F98 5052 bytes
font_01_sfnt_off000150bb.bin
a20446ad0d1f6ada1e983999ddfa6c6b9d55143aa278446a9a5cc7b43901d1e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x150BB 10600 bytes

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