Malicious PDF — malware analysis report

Static analysis result for SHA-256 65efd3b9046e0148…

MALICIOUS

PDF

76.5 KB Created: 2021-06-10 14:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4bf954a27200d5b666fce9183b4cc196 SHA-1: 46af5bacbb19e37d0162c0d5826738d5cb21d7f6 SHA-256: 65efd3b9046e01482401cef0268c802fa66e5b35fc3438f99129b47601b440ef
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 0.9997

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://drafthe.ru/pbw?utm_term=yolikers+apk+2021 PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4449183/normal_60b6956915f84.pdfIn PDF document text
    • https://vikaworapelesob.weebly.com/uploads/1/3/4/7/134702945/4ebfe496cad.pdfIn PDF document text
    • https://fuviwezajoz.weebly.com/uploads/1/3/1/3/131379384/216028f41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467298/normal_6040014ae956e.pdfIn PDF document text
    • https://gibejuta.weebly.com/uploads/1/3/0/7/130776113/94124fd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420036/normal_5fe98e2c667dc.pdfIn PDF document text
    • https://muwubuzegutan.weebly.com/uploads/1/3/4/6/134649477/bee8c17f8.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/e08488bf-bf13-484c-a3cd-32a39bac1010/32878639649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ef6b0d8-cb9d-4fd3-913f-62dd7fb250b2/68770880694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75941285-8039-482a-9eb3-e6eb46008500/seth_godin_new_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e367e57a-8d9c-43a4-9113-e7e9f016594e/download_mutant_creatures_mod_1.12_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a458b6a7-cebe-4d62-8d74-e3d56ce93190/finnegans_wake_menu_winston_salem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2615f70a-a9d3-4f9b-8c0a-dcfc76bd161f/nokifivuzamamefezeduvuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4639d9-2cac-490c-a340-47589094f428/sports_illustrated_swimsuit_issue_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712a31dd-df0f-45a5-bf44-27951d9b75e4/what_fitbits_are_not_waterproof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d695bdc-2d82-437f-b316-a7ee3c0c653c/is_elder_scrolls_online_good_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5b654b4-c9f7-4256-88bc-3744c4eb742f/73690286801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f127be09-10e7-458d-a98f-ec2c72d6d38b/xutosodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e36410c-ac68-4f83-a517-261af8137308/66777112213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d018f0-3a79-496e-944e-3b0cffa0872b/bupagumekuw.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_off0000eeda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDA 5164 bytes
SHA-256: ea429d05eccb8606c65f34d53b02dc94afb7bfdb17dfc67492fbbbe77e264db6
font_01_sfnt_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 10728 bytes
SHA-256: fbe43cb78826c1a4f0f14a1d9188c5abead87e56332ddb8810d0ac45085391e2

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