Malicious PDF — malware analysis report

Static analysis result for SHA-256 689bde370a03529e…

MALICIOUS

PDF

94.7 KB Created: 2020-11-14 09:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ac064370229d48886a79bd167ae03cd0 SHA-1: dde9fa9ab1492d3d2744992c43b1de65b68fe324 SHA-256: 689bde370a03529e55260fec14bdb76b4043691aaf9080910fbd1aa234902b11
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffking.ru/123?utm_term=marble+board+game+rules+with+cards PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f91b34ebac9e.pdfIn PDF document text
    • https://mojipidu.weebly.com/uploads/1/3/4/3/134391160/sosodi.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/bca5529b-9125-4d86-9579-0e3015d9dab2/ralokawipububokojar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8ded92-0d56-473f-90ea-203f961b4964/libozaxogad.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/kiwisutawogojiwoper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d553c56-07b2-4e52-9a10-79a7f60d2617/lemanirisudeluxawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ace23d5-c3cb-4beb-acfc-1cb37e6f53cf/mufukojatagego.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/jesazovibufiragelapatof.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/pdf_blank_map_of_africa.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014338.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14338 24664 bytes
SHA-256: beda0ea83a607f19c9dc1c6d7fbbc1132cacb8b2ef6294925a21596889a06f42
font_00_sfnt_off00010aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA4 5588 bytes
SHA-256: 50ac6964eaa7a59883fc84c420536fff815cd4fd347dcfcf614486a95ae6ef00
font_01_sfnt_off00011d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D90 10976 bytes
SHA-256: 95d03b795f75d8f3288af51debb92588361d7e48675462b7e4b945549d3e926a

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