Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee60586442ff5fc…

MALICIOUS

PDF

69.6 KB Created: 2020-11-21 07:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1a92a14639becbef0715a83085e1c5ec SHA-1: 3115728763d841390c4fad1f095fb1de799f794c SHA-256: 0ee60586442ff5fc0d624406d615a02a6c0f12e97eb249a82029032eb17e50f3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM'. The document body, though heavily obfuscated, contains text related to 'Command prompt commands for hacking pdf' and mentions 'wkhtmltopdf', suggesting a lure to external content. The presence of multiple external URLs, including one flagged as potentially malicious, supports a phishing or SEO spam attack pattern.

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://trafftec.ru/aws?utm_term=command+prompt+commands+for+hacking+pdf PDF link annotation
    • https://liforofejot.weebly.com/uploads/1/3/4/3/134350560/tamozizojujegabok.pdfIn PDF document text
    • https://lolijigi.weebly.com/uploads/1/3/4/7/134700793/da42265427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5f9d110f4ba37.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/b8fc144390ed.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/39f29194-4770-40bc-9d44-6fb4ac52282f/wolovuwalevedisugizetejuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746a225e-fa35-412a-8b3a-3448e8b16c26/zanalifuwibiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb6bb7df-3736-4d5a-95b4-f41a5807377f/abnormal_softening_of_the_nails_is_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a075e1e-6294-4748-8065-369cae8c8500/41085232445.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/que_son_los_antimicoticos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18239006-eb30-4833-a424-718eb8f954c0/88818354322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e852170-6f84-422c-a40a-4007810196eb/rexevewibajozo.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/atoms_molecules_compounds_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f8bfdf-6382-46c6-9f19-acad7243b002/27_5_as_a_mixed_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5848242f-ec29-4d05-ac37-eb352c789580/55_useless_facts_msn.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_off0000d29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29C 5508 bytes
SHA-256: d3ffd2935ce0ab2d5b1670a0a65a96e38685eec21a84bc09269a379bfca737a3
font_01_sfnt_off0000e526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE526 10600 bytes
SHA-256: e2f9421c2b138e7664894c14b1cf26af84edb3a248efb96edcd2cb8e07ae5e46

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