Malicious PDF — malware analysis report

Static analysis result for SHA-256 640edbfba6ea92a4…

MALICIOUS

PDF

80.6 KB Created: 2020-12-10 10:35:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4a5f4e528eb2bb2d0c0a206ad08c8014 SHA-1: dc5be21ae9ab128fce96212da18bdde0accb98ac SHA-256: 640edbfba6ea92a45da16c6b03db78a1a88a75ca8335fb56c80696e238cfc027
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 0.9998

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
  • 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://trafficel.ru/strik?utm_term=minecraft+data+command+villager PDF link annotation
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/litamagul.pdfIn PDF document text
    • https://kafigibedup.weebly.com/uploads/1/3/4/4/134479504/logewiverekuradujo.pdfIn PDF document text
    • https://zoniziwaxetoxa.weebly.com/uploads/1/3/4/4/134441104/2397997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422897/normal_5f9e2de09ead8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5f9afe5fe8796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f89347c96ac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f9e06745f732.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/f591cb33842.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc69156239b072291587631/t/5fcb760026a2be7f6de47851/1607169536335/wish._com_promo_codes_for_existing_customers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac0726d7-38f1-46bb-b849-865eecb72b99/68413278642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d729a5ed-0f56-4adb-b2a1-b933097b56f6/90675946286.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b295abffab30daadc730/t/5fc866e126a3037b433af40c/1606969059074/adventure_academy_telephone_number.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc548dcd26ff1194f90dc53/t/5fcb80849cf56e0e8b126969/1607172228884/muloxuwijarile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ddf0f8-8617-4328-af95-1a4bd30b1fcf/vojawedixofedutato.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc013fe3398ff751529adbc/t/5fc15ef7fa04221c71530cf3/1606508280546/14200187839.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc535621452f90b7f014908/t/5fc821fe92e74531f3bf5974/1606951422682/nintendo_switch_online_gift_card_australia.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_off0000f9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E7 5228 bytes
SHA-256: 1160f57106fe02a62228cf729bbbea9b92d05f03e8ddf24918bd37a597348e71
font_01_sfnt_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 12312 bytes
SHA-256: 9c01c12b539ab972f3fd5e7d6986afb2a0f94284833b5a6cad024bee9f836452

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