Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d1b9d178c3ffec…

MALICIOUS

PDF

74.5 KB Created: 2020-11-26 10:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 318c56d532382ae5f85337899a3ffce3 SHA-1: e2739f189f2e7ff3e6ff66aab9ee97e53cf49308 SHA-256: 88d1b9d178c3ffec1422fc4795824c05463761cc33e6a955b846c388bda711fd
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded link, https://gettraff.ru/123?utm_term=olympic+bench+press+bar+weight, is identified as a known malicious redirector, suggesting the document's primary purpose is to lead users to malicious sites. While no scripts were explicitly extracted, the PDF structure and the presence of malicious links indicate an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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.
  • 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.
  • 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/123?utm_term=olympic+bench+press+bar+weight In PDF document text
    • https://xofilovinavi.weebly.com/uploads/1/3/1/3/131379248/vonajat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_5fb4000d7a0ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463792/normal_5fad3ce4bbac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_5f999aea1d898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372076/normal_5f9dbb80b632c.pdfIn PDF document text
    • https://viwekaxirudadax.weebly.com/uploads/1/3/4/7/134700275/nudijepa-bamakegikobix-pisedetabem-fugosuxebikaf.pdfIn PDF document text
    • https://pudiwozi.weebly.com/uploads/1/3/4/5/134510484/bifetutopuj-wiluwotisivol-jesesaxufotud-tewuri.pdfIn PDF document text
    • https://mesifadenox.weebly.com/uploads/1/3/4/1/134108947/6c4080b75009075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_5fb2f62eab7f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369511/normal_5f8c4ca5a108a.pdfIn PDF document text
    • https://xukutejupu.weebly.com/uploads/1/3/4/4/134487517/52b30459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5f89032f327f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jixerubowi/iron_kingdoms_full_metal_fantasy_roleplaying_game_core_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/aadukalam_video_song_hd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD995 5384 bytes
SHA-256: 374f62c7fcb3faf1dbbc2f2f54ced3c921115c18e7e5f0a81d3f87d659681336
font_01_sfnt_off0000ebc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC2 10124 bytes
SHA-256: ec1f87d532e343d46e9d685247b362f7dfb30c59d474a534803fa0c016e0108d
font_02_sfnt_off00010e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E86 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34