Malicious PDF — malware analysis report

Static analysis result for SHA-256 a310daaa14f554bc…

MALICIOUS

PDF

69.7 KB Created: 2020-11-20 10:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a62b1e1e000cf6f408d7b2fbd074b1a7 SHA-1: d77dae11cd4af86c211e549cdd21847849479294 SHA-256: a310daaa14f554bcb0d6e6ecddff5c4f39b5874ffdadd7633a230eb7757a90dd
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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.
  • 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=mickey+mouse+coloring+pages In PDF document text
    • https://lazidejapagopi.weebly.com/uploads/1/3/4/8/134891766/7453323.pdfIn PDF document text
    • https://farigelud.weebly.com/uploads/1/3/4/2/134266281/0c3fbc367.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/soxakupowaviguw.pdfIn PDF document text
    • https://bunemanedadon.weebly.com/uploads/1/3/4/4/134476229/sadezi_segasofoxuvos_mazizexotasasom_viralidudalevub.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/bivanud/prince_in_atlanta_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/your_unblocked_games_.io.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a8c6dc3-e8c9-49b8-bd77-9c18fdd754a8/mumawefedodonimosurozumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd1dcb9-123a-4976-a0af-ff3fc7c499e2/47892856348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929cd3f1-d022-4ba7-b0cf-f7414049da35/nick_jr_tv_channel_xfinity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0044abb-d228-4069-8b08-7257ccbb3355/talebunoxaful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33655f46-150c-4484-9c99-a1d133170ce3/putanemumapuxamiwubitugub.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_off0000c495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC495 5228 bytes
SHA-256: 33b3d62d75a51c25ba9d41f12cf5699af7d36bcb94660bc4075b33ed885aef41
font_01_sfnt_off0000d644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD644 11024 bytes
SHA-256: 81229d9d71fdfeeb68aa09aeb3f8900d55f69c0737ca8577c527a03436bc7b3b
font_02_sfnt_off0000fbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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