Malicious PDF — malware analysis report

Static analysis result for SHA-256 0098acfc9cad7365…

MALICIOUS

PDF

75.9 KB Created: 2021-06-10 22:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 57e38bd0ca089295360d247d44a4bdc2 SHA-1: eae4a053e1d30d9718ca1c9b7cf58cb5f9500588 SHA-256: 0098acfc9cad7365ec0b9cec699c73afcef24f0a01cc6f99da8340e7f2a4669e
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 0.9991

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://pistant.ru/pbw?utm_term=relative+humidity+and+dew+point+worksheet+answer+key PDF link annotation
    • https://gazisaki.weebly.com/uploads/1/3/4/3/134371182/8ebd52c6c4005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413469/normal_6024f1c77880b.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/3659534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_605ff86357a75.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4485161/normal_60b599589f78b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490129/normal_6001cf29c263d.pdfIn PDF document text
    • https://karimimeri.weebly.com/uploads/1/3/1/1/131164281/fewabewukaxa.pdfIn PDF document text
    • https://kaneloko.weebly.com/uploads/1/3/1/4/131408798/317071.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471512/normal_5ffae3aa440fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454967/normal_5fe7265a05787.pdfIn PDF document text
    • https://duxevuwelinabim.weebly.com/uploads/1/3/4/3/134353564/ditakokozasob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414501/normal_5fcb6b9139d28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483349/normal_5fcc093797f4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384650/normal_600854c45e6b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481168/normal_6025be6f01049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477655/normal_5fc7f9f412a6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_60421b99a0f6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446285/normal_5ff8232469c02.pdfIn PDF document text
    • https://pejifivoriruruk.weebly.com/uploads/1/3/4/3/134314693/ropojifixomitefage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385410/normal_5fd071582886c.pdfIn PDF document text
    • https://xidelora.weebly.com/uploads/1/3/5/2/135296398/megule-wunudawuk-ronule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e99d6692-40c2-4507-9b69-7f87dc41de9a/pokemon_mega_emerald_x_and_y_gba_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04db76a7-1db9-464a-b832-db77d15c2817/the_republic_of_plato_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d30f18ac-a705-417a-b67d-40332c8bdc73/zukupi.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_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 5524 bytes
SHA-256: e3dc8fcce9222b8e7398ec20f25a887e633676223f7e8ebf5a04079268a5c36e
font_01_sfnt_off0000f8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DE 11952 bytes
SHA-256: 2e1047af8eb4ff19e831a42368ca0ce6456383d8e3b4d9c964b4528444a754d8

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