Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e93cba47448766…

MALICIOUS

PDF

70.5 KB Created: 2020-11-17 06:10:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 321b5d3bf00f4205915af8f4fe29d7fe SHA-1: 9027c1778b00ad34aad5c8a22110ac245e3b5ca9 SHA-256: 33e93cba47448766f139bd613dc05532ed376ae25a6d568c30a7eefd79bf6c42
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 0.9997

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://traffine.ru/123?utm_term=wow+cata+herbalism+leveling+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f8d6ab57ad6e.pdfIn PDF document text
    • https://pedegafulip.weebly.com/uploads/1/3/0/9/130969407/7a118c7f80fa99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5fa0e0b90cc40.pdfIn PDF document text
    • https://fudegenajeno.weebly.com/uploads/1/3/4/5/134581691/bijugexibasid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410462/normal_5fb2601e9268c.pdfIn PDF document text
    • https://foseduvix.weebly.com/uploads/1/3/4/4/134491956/foluk-sumaduk.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/suxiweke/forensic_files_worksheet_a_case_of_the_flue.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/act_upon_information_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/arasan_tamil_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a048272-9733-45da-845c-e6a0df3ca25d/14345984610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21cf9c9c-9e34-4b00-a6a4-f336ca842560/laxelilik.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/nevemizitagarogerut.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_off0000c794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC794 5540 bytes
SHA-256: e6f76703ca881a449a030f4d320259ee41cd3b46bd117eff8c247a390f0b664b
font_01_sfnt_off0000da58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA58 10320 bytes
SHA-256: 23b59de67b1ea9b012be58bb0f06de31197d7b14b709e8e4a951d37306cf448c
font_02_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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