Malicious PDF — malware analysis report

Static analysis result for SHA-256 1319e6c2b27993d3…

MALICIOUS

PDF

68.5 KB Created: 2021-02-25 15:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c7c8d829745c71e94574608e527429f3 SHA-1: b98fde88708bad1a27a64dbd5714cb3b8c2298be SHA-256: 1319e6c2b27993d3a89c61f06d13e18136d2e9b608e3fbb17dbd10652fce88eb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF_SEO_LINK_FARM heuristic. One of the primary links points to 'bologen.ru', suggesting a potential phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://bologen.ru/123?utm_term=kitchenaid+superba+oven+set+cook+time PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491168/normal_600b08742d190.pdfIn PDF document text
    • https://cdn.sqhk.co/pawexedibib/hjjaOHJ/history_of_machine_learning_in_healthcare.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/Ruhhfid/42999402046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_6024c0e676d64.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/icZGvig/guidelines_meaning_in_marathi.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/4Eiicgg/wegoguvutomanavuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/hcgfYs4/gevobox.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/5800583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5fd76023ea24e.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/cgevcgi/40573433039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5fd2a4f2bfc65.pdfIn PDF document text
    • https://rofupujo.weebly.com/uploads/1/3/4/3/134335987/vefogejen-kifugegab-xokoguvu.pdfIn PDF document text
    • https://vekewofamir.weebly.com/uploads/1/3/4/1/134131384/titaxowimup.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/2hhFhij/wisepamezifelaponegiz.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/wibadinavosunom/wapogubo.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/rivorabuwitasepawubute.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/battery_saver_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/peptide_bond_formation_during_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/kelevanonewozevo.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_off0000cf33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF33 5512 bytes
SHA-256: 19a976e381fdf72d877d819a69bf5629b1c8c07dcd080e73999cf392babf928a
font_01_sfnt_off0000e1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C9 10172 bytes
SHA-256: 3ea313425171ae1930fa54b626a6b38236d3e1ea2004d16b00658a6648d38f51

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