Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b48e1d23f0be1af…

MALICIOUS

PDF

80.4 KB Created: 2021-03-20 21:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: af7a8b583c3478e81653c7f499830fba SHA-1: 109e1d6384bb61a2b49c9bf2f2cc1eb1964146aa SHA-256: 7b48e1d23f0be1affe2c2d2764f698dd050849f56e580bc5f3aa1367afd34d5d
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/wix?keyword=the+hunger+games+catching+fire+movie+download+in+hindi+720p PDF link annotation
    • http://sevibifodome.getenjoyment.net/bible_kjv_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392656/normal_601cdae7b503e.pdfIn PDF document text
    • https://zibezalobe.weebly.com/uploads/1/3/4/5/134529300/daxof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_604754400f438.pdfIn PDF document text
    • http://jiwabozaxexe.mypressonline.com/vajojanazefumajapazafo.pdfIn PDF document text
    • https://wuzovogupo.weebly.com/uploads/1/3/4/7/134720757/gudusik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413714/normal_602ad824060bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422161/normal_60512973ba288.pdfIn PDF document text
    • https://xefolulewonud.weebly.com/uploads/1/3/1/4/131406676/gesuboluvafekon.pdfIn PDF document text
    • https://zulovinivu.weebly.com/uploads/1/3/4/7/134758195/pirijo.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/pidufozu/todivimagoviresa.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/jomikugesulizirex.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/why_the_rich_are_getting_richer_robert_t._kiyosaki.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/leadership_styles_examples.pdfIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_8c2e95d4949242cd94b4eb2d86d71f26.pdf?index=trueIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_fd45bdef04764eee8311bc6675b3641d.pdf?index=trueIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_82bc9107a6da4a0c95ce9930fa0256bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bakoloj/2184063538.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_off0000f9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 6024 bytes
SHA-256: 78458439f7073613475a165d914f7e7c39474e844e27b02c80fa54286dd464ce
font_01_sfnt_off00010e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E24 10948 bytes
SHA-256: ea9811f280bafb3656b1437d09c1c452f8262c380e86769a0f1a8e8ea316acc2

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