Malicious PDF — malware analysis report

Static analysis result for SHA-256 9110db5266c70505…

MALICIOUS

PDF

62.0 KB Created: 2020-11-27 12:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8dbc249b6f9fa7ac9a88aef4649df69d SHA-1: d9842ab0c86938455bb7480e748207145ba23f49 SHA-256: 9110db5266c70505af078a1df646bb0e79e9e91b717e065fc115cf7a32e9f692
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 0.9995

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://trafffe.ru/strik?utm_term=30+amp+generator+cord+male+to+male PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457582/normal_5faf4728c99fd.pdfIn PDF document text
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/gufibivezafef_nabiwabuwexa.pdfIn PDF document text
    • https://puxolulif.weebly.com/uploads/1/3/4/3/134356270/duwifizipomulak.pdfIn PDF document text
    • https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/2330be58a.pdfIn PDF document text
    • https://jaxebenub.weebly.com/uploads/1/3/4/2/134266064/gesaki-xalatakudavixip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f8b3e2e09130.pdfIn PDF document text
    • https://fawawivog.weebly.com/uploads/1/3/4/5/134595284/7758249.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/xozeb/30628519308.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/stone_mountain_elementary_address.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/words_with_distance.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/heroes_charge_outland_portal_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/c_s_lewis_quotes_suffering.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/21809576707.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/34867807525.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_off0000ac0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC0F 5168 bytes
SHA-256: bb25d6ca35fb70e21a8fc32b99b65f7495e1e744235486900d98c3c5582252cf
font_01_sfnt_off0000bd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD6D 9220 bytes
SHA-256: abc86f77446d6672731cc8117e6de0fcb1b8576716440375fbd1b23980d3927b
font_02_sfnt_off0000dd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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