Malicious PDF — malware analysis report

Static analysis result for SHA-256 1635adcfe686662c…

MALICIOUS

PDF

74.0 KB Created: 2020-11-14 04:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9c85a6c5150f3a02fa2de9c4a94ec306 SHA-1: c13ce7d1131de0f8816ba10c547dcc678a81d817 SHA-256: 1635adcfe686662c0a6d1a76b77bfb5089af930dd9d95d8171d5d0137215e5da
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is disguised as a download for 'super mario 3d world rom download cemu'. This strongly suggests a phishing or scam attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?utm_term=super+mario+3d+world+rom+download+cemu In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5fa1f8a5ea055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373301/normal_5f92074377304.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/nakevoja/vekebekaf.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/hulu_live_tv_free_trial_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5258a51-7dc4-40a7-8016-17a14a167279/pizuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/804e8519-e003-4f9f-8f34-6a2bb8ae360c/kobix.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/gutozalirekigi.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/56174386393.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/firumofe.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/51541697785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41393933-f792-4385-82a5-5f4fc835f85f/disonudilegewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ffc844-c9b5-44a5-a1bc-d740e938e1d7/allied_race_heritage_armor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4397ba9-89a6-47c6-8628-4c1c67b7e77f/43332566347.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC847 3592 bytes
SHA-256: 72d08c70b67f0b8a086684e7393f5d89990ac98f22137bba618b1e265e793718
font_01_sfnt_off0000d517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD517 5200 bytes
SHA-256: 9b889e8baa1ecde2efe5bfac29e4bc6366ce95cefb5b6f9f51c6c84e7b58bcff
font_02_sfnt_off0000e6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B1 11332 bytes
SHA-256: 23d717eca4ad3b7d6b8f365e613c9f79d0800f9dec3dc8beb8fe3a6fa0f71a80
font_03_sfnt_off00010c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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