Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbc34a3ba760b03…

MALICIOUS

PDF

74.1 KB Created: 2021-05-30 06:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 061cb02b8ff0b36c5368083c75a26fd6 SHA-1: 844a41ab9ba4e59483e4fd514f8cc1ba0957cc0e SHA-256: 5cbc34a3ba760b039d5ea63af4af1123d627ad225b4051dc13fdefc96575b3a2
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF documents hosted on disposable domains, indicating a link farm designed for SEO manipulation or phishing. The primary lure, 'How to get philips tv code', directs users to a URL that is part of this link farm. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest potential for embedded malicious content or redirection, consistent with phishing and SEO abuse tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://druttle.ru/strik?utm_term=how+to+get+philips+tv+code PDF link annotation
    • https://jurogewogil.weebly.com/uploads/1/3/4/3/134318518/16589.pdfIn PDF document text
    • https://gebajujevaxudod.weebly.com/uploads/1/3/5/3/135398545/wanomok-sezafapep-vomekepafo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417129/normal_5fe3742f39c68.pdfIn PDF document text
    • https://pifupiwotuz.weebly.com/uploads/1/3/1/3/131384694/gipelilodovifopiji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5fc5d58f74e67.pdfIn PDF document text
    • https://wirolarem.weebly.com/uploads/1/3/1/6/131636642/7500301.pdfIn PDF document text
    • https://vuxupiwiruxip.weebly.com/uploads/1/3/0/9/130969000/biwogekazerevomiku.pdfIn PDF document text
    • https://donaleta.weebly.com/uploads/1/3/4/4/134481941/9932376.pdfIn PDF document text
    • https://gajaxaja.weebly.com/uploads/1/3/2/7/132712369/tewumizaxelexijito.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475739/normal_5fc800062129b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8363a96b-0402-4c01-9101-777e2193c563/jizobof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ee6fe7-c31a-44d9-9a28-74fd67e79f35/relion_thermometer_06429_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91d2f24d-6921-447a-a4d1-61bde0649947/16664819439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bafb0072-9c22-45b2-b4cc-b9404e4a50ec/4407221727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74856f9a-247c-4f5e-8d78-f8c3875cac24/batch_convert_xlsx_to_csv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37bc3801-da37-463c-b3aa-95499aa78a76/93144120197.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE645 5140 bytes
SHA-256: bcc7b111acf34ed68f25a4595078c13ebdfde94fc30e59a8572c551ef3e7396e
font_01_sfnt_off0000f7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E6 10432 bytes
SHA-256: 7225e402c3e8bc8636455020a3b17d0ed44250e7ac484650a8290a1f81f8c2ef