Malicious PDF — malware analysis report

Static analysis result for SHA-256 896560dfe65246af…

MALICIOUS

PDF

58.1 KB Created: 2020-11-19 23:36:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e45836c19a081a0f91a564e00e69b0b1 SHA-1: 1258ff98221781d8abb11269a71d75fb96dfac29 SHA-256: 896560dfe65246af39749ca86ba5299a651431c39b6421a9738c539f7bc32c2c
156 Risk Score

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 0.9996

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=apostrophe+plural+worksheet PDF link annotation
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lorewuk.pdfIn PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/1215706.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/8814315.pdfIn PDF document text
    • https://lesajevix.weebly.com/uploads/1/3/4/3/134318042/gedomeveg_kegoguzo_mivefela_rumowafis.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/4589730.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/vawoginele/dokabuburugemopivif.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/66285022415.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/poetic_devices_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/all_region_honor_band_oklahoma.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/consecuencias_de_los_riesgos_psicosociales_en_el_trabajo.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/gotedob.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/stinky_cheese_man_book_download_free.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_off0000a9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B0 5052 bytes
SHA-256: 1a278f919af85f33848009eccc64d1c25a8649162b88b815e530a4b3031c592b
font_01_sfnt_off0000bae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE3 9680 bytes
SHA-256: d74fe1946f95f429fc93b1675260574ca4c0a01b8fb57c89773e71bbea5102ee

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