Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1a0f8637844f85…

MALICIOUS

PDF

67.9 KB Created: 2020-12-04 10:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f619edb4cdce20d6a245280a3450d818 SHA-1: dfb401e42f491eb8feafc57c728366932fb059b4 SHA-256: 4d1a0f8637844f8514bd1d657a32721217425027f1f45f63318f140ba327c48e
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 0.9998

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://trafftec.ru/aws?utm_term=tennessee+wild+boar+hunting+guides PDF link annotation
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/5153312.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/turexulanugemo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc58624bd14ff0dd2bbf2b9/t/5fc9ab5d822fbd3263db5329/1607052130741/calorias_da_caponata_de_berinjela.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/kesuf.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/28284913680.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e526c6229360ecacefcf/t/5fc1f93ef3de5e49b5aa9373/1606547774716/95960196813.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/machine_spirit_40k.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/foyer_lighting_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/analyzing_and_interpreting_scientific_data_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/xupekesurejizetemaxexadej.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b63bab79f442f228a4c9/t/5fc7030e9dfc2a4045148632/1606877966767/67219593537.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d53ff7cf8c75402a95c2/t/5fc935e227f4d55db2edef2b/1607022050756/kagavatamolotezivirup.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/5g_gelatin_sheet_to_powder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2092e2a3-ab50-42ae-abbb-a71ed900c5e9/subaru_ea190v_pressure_washer_carburetor_parts.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_off0000cc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8D 5268 bytes
SHA-256: 9e2cc781eb08c43ed3df97d5654105f9f3c9357f40284d98712e46d2344e9c64
font_01_sfnt_off0000de7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7E 10556 bytes
SHA-256: 38850885b9b70bd4c88a6a2b0cd72d184f165f0a8568eb3b2ff590ab086711ce

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