Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8554977d0009fd…

MALICIOUS

PDF

77.8 KB Created: 2021-05-25 03:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4df9be1c11077571164392c0b338b5e0 SHA-1: 7ef576e4b20ca41c120a72213a73b1f3e9b0b0bf SHA-256: 6d8554977d0009fd3756136e3ff466942de2a52891c7823c519a2c3b30f6a9aa
196 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure and a link farm, with a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though partially corrupted, suggests a 'how-to' guide for pairing a remote, which is a common social engineering tactic. The primary external URI, https://dugedepap.ru/strik, is likely the landing page for the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dugedepap.ru/strik?utm_term=how+to+pair+rogers+ignite+remote+with+tv+volume PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481173/normal_5ff457506cc91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5fe6341783656.pdfIn PDF document text
    • https://sobomimaseneke.weebly.com/uploads/1/3/1/3/131379860/luwuporafefixuwole.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/5690738.pdfIn PDF document text
    • https://bemilinup.weebly.com/uploads/1/3/4/3/134390274/lupuwedefeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393190/normal_6044c9d15bdcb.pdfIn PDF document text
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/6660559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458431/normal_6064b56172b39.pdfIn PDF document text
    • https://redelonoxoti.weebly.com/uploads/1/3/1/6/131606094/8796870.pdfIn PDF document text
    • https://polemezal.weebly.com/uploads/1/3/1/4/131452876/5780167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5fd182d9ad532.pdfIn PDF document text
    • https://dolopexoje.weebly.com/uploads/1/3/1/8/131872138/goxexovi.pdfIn PDF document text
    • https://lolosovosozo.weebly.com/uploads/1/3/4/8/134882251/8676843.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/gst_tax_slab_item_wise.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/amman_alangaram_images.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/ikea_hemnes_twin_bed_assembly_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/who_is_considered_the_most_influential_person_in_history.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/medexozan.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/sony_alpha_a6500_specifications.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/acer_projector_x113_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/hafnia_tankers_ltd_annual_report.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_off0000f475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF475 5348 bytes
SHA-256: 1ff30b64593858fb055d3997aefebae9eb514bc87ae521f52f9fc43a9e861bc1
font_01_sfnt_off00010690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10690 10288 bytes
SHA-256: 087d0ccabd40fa3a2e07afccf4b95b59c0273b9e48ab2bf01103ebe4e82d2fd7