Malicious PDF — malware analysis report

Static analysis result for SHA-256 867d64f15119b9b9…

MALICIOUS

PDF

71.6 KB Created: 2021-02-22 17:22:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1dcd820e47e62237e65f4edbe1dd6fd5 SHA-1: c1942a010d5811af8ef24201a65ffc36bbd9a415 SHA-256: 867d64f15119b9b92bb0d6c498fffd269bb0722a2342fd42840d17b86e8fb399
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. It contains numerous external links, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be related to product search terms, reinforcing the lure. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious URLs.

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://bologen.ru/aws?utm_term=samsung+remote+bn59+pairing+to+dvd+player PDF link annotation
    • https://cdn.sqhk.co/lakuxezaj/avhaiba/gijomabopavagonuzudu.pdfIn PDF document text
    • https://dodikajopofibu.weebly.com/uploads/1/3/4/7/134704264/wigawikogel-porifi-bawupavegapan-lamexugukow.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/geiyEBc/slice_ice_des_plaines_il_60018.pdfIn PDF document text
    • http://koguvagad.22web.org/nikon_coolpix_p520_price_in_uae.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/jjhihjh/legion_of_ace_chaos_territory_tier_list.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/hjdHHij/amc_stock_projection.pdfIn PDF document text
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/sosamo-dapiwufuwavar-zexevetatuj-sozujokutusilus.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/TghjgsS/free_lesson_plan_template_for_preschool_teachers.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/kitakilesa/92350150411.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/vokobozi.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/standard_deviation_not_working_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/lakers_trade_news_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/tawigivudan.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/lista_pares_biomagnetismo.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/pulezobokofajiw.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/51277000488.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_off0000cb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB89 5848 bytes
SHA-256: 86b3ad914805a9c04ddb856a9e80f2f646698a5b14bdd2b14fe38bb1b0804301
font_01_sfnt_off0000df50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF50 10328 bytes
SHA-256: 4b505a8115c065ade97e047cbc55fdbc6745f6259b9c06d438aa3fcb53862cc6
font_02_sfnt_off000102b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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