Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5390b7e731d6a7b…

MALICIOUS

PDF

70.3 KB Created: 2020-12-23 12:27:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d331a3aec5663559d45bcaa9e887b764 SHA-1: 773944de4d8fee2a22c6aa18dc82bc6c53ebfa80 SHA-256: a5390b7e731d6a7bfa2ef5bc2a5d09763f6bcc3f522dd4865e587f097a4fd0db
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to redirectors designed to distribute further malicious content, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ClamAV detection and ML classifier also strongly suggest malicious intent. The primary attack pattern involves luring users to malicious sites under the guise of providing gift codes.

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
  • 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://traffmen.ru/strik?utm_term=guide+for+soul+knight+2020+gift+codes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_5fbc3d854dceb.pdfIn PDF document text
    • https://sorezoxawo.weebly.com/uploads/1/3/2/7/132712551/9a36e748.pdfIn PDF document text
    • https://xewaxamuroz.weebly.com/uploads/1/3/4/5/134529724/9124377.pdfIn PDF document text
    • https://zosetujisux.weebly.com/uploads/1/3/4/2/134266291/3232533.pdfIn PDF document text
    • https://dutofubexel.weebly.com/uploads/1/3/4/6/134631161/c6033b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_5fd76cffd41c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/pebonajalegi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d38e5687f52b6b8dad8d/t/5fc4cea53570fb44d19a1c34/1606733478053/95620972465.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/73269384767.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfe7e212facd59cea75dab/t/5fc86ee06652ad59ec28fc31/1606971108097/30226358578.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe13a29d00a716838849fe2/t/5fe16b8876f612648cbb0612/1608608666256/pediatric_brainstem_cavernous_malformation.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/possessive_adjectives_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/bunn_coffee_maker_cw_series_manuals.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/fixie_bike_stem.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/27086155548.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b7658b9e860b7b1c0c38/t/5fd1ff18f2ee360040fdfaf9/1607597849147/79290830201.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_off0000d30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30F 5440 bytes
SHA-256: 5189fd481f3282fb192dc640f321a0ecf3115671fed23397904c99bde563a372
font_01_sfnt_off0000e59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59B 11680 bytes
SHA-256: 44e31dc08b2eb0ab942210670cd3005f25bf1cbffb019b47bbd72d920aab0409

Open this report in the interactive analyzer, or submit your own file for analysis.