Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6dd3e7c4cb6397…

MALICIOUS

PDF

78.9 KB Created: 2021-04-14 13:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3a0ff23ef7f5ef367e9dae49fed494ef SHA-1: dcb357e318bee0e36e05bd887d1ff4c29c141635 SHA-256: 5f6dd3e7c4cb6397c6b8509063495433df823e7bd073efd3bcc55c1b7e036f7d
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://mezovuduw.ru/strik?utm_term=dungeon+saga+rulebook+pdf PDF link annotation
    • https://jasadugo.weebly.com/uploads/1/3/5/3/135341750/d5fbc4d060f2c6.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/2665783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491669/normal_6018a70e45b75.pdfIn PDF document text
    • https://xivogere.weebly.com/uploads/1/3/0/9/130969247/nenalilajalezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_6026bfbf9f7c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_60421bf6b2d82.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/mokesosexizuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403824/normal_604a982aa8002.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475741/normal_5feb7f51eee0f.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/kitakilesa/43331180632.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_2602f9132cb34804bca097f0f5bd5929.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupuxus/sufewolida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75eb536-9b50-4ae5-844c-03a48f570f16/what_is_the_definition_of_technical_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/lezarekibisarikezuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2332b24d-257d-4298-926b-d353f55ee2f1/2007_chevy_trailblazer_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64844080-9c38-441f-ad8b-97ccc2e0af9d/advanced_boxing_training_skills_and_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4445368-9689-4170-88bc-613594a9c965/posaxatagejilojefe.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/judododotefifikofaz.pdfIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_390fc81d9aa547b3b0ccb928daa45270.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d664fd9-4667-4d18-9574-aca27e9b962b/sears_12_inch_band_saw_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/rainbow_fish_for_sale_uk.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_off0000f448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF448 5412 bytes
SHA-256: b353ee584a091597db39edee83e771edb60d571a1574e92f56aa779018a7731d
font_01_sfnt_off000106c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C1 11692 bytes
SHA-256: 7794a9f5c342d4216dee27286c6129129a26ba7ae185a7b15df6c038c8eeb4d1

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