Malicious PDF — malware analysis report

Static analysis result for SHA-256 475b3422ffd23235…

MALICIOUS

PDF

79.6 KB Created: 2021-03-10 20:31:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 909d30944a0307961914eadfeeb0b658 SHA-1: 9a8a0930f303a692d9af661c7fa1c05ad32fad10 SHA-256: 475b3422ffd23235db2e8638508fc9c8a7a001ba719495f78a8631f767c60fa8
66 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 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 4

  • 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://lozipotod.ru/award?keyword=arlington+va+map+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448339/normal_603eade5b17c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448724/normal_6010b747dc88c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425514/normal_5fc73161c8ae8.pdfIn PDF document text
    • http://xivusolokedujes.22web.org/96373279929.pdfIn PDF document text
    • http://vuxiparami.22web.org/lubewol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_60392979edb1f.pdfIn PDF document text
    • http://kersita.space/42485815872cp8qo.pdfIn PDF document text
    • http://nudawofafakab.22web.org/certified_scrum_product_owner.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455881/normal_5fe2a0e611d1e.pdfIn PDF document text
    • http://vashobereg.com/walt_whitman_as_a_poettrqkc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_6008fcb9edcf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_60157f82b8c65.pdfIn PDF document text
    • http://tifajoni.iblogger.org/rixipunotawujutupexu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_53cfeee5834348939ea3c02350342830.pdf?index=trueIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_bd3b6ee9b97945efa9c975c42e67eba2.pdf?index=trueIn PDF document text
    • http://sakigekoxigukil.epizy.com/27367250811.pdfIn PDF document text
    • http://zinipuzotekum.rf.gd/astro_a20_wireless_headset_ps4_slim_setup.pdfIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_cfe2ac479e1f4608ad8188a2aec64dfb.pdf?index=trueIn PDF document text
    • http://telomilabevi.epizy.com/garageband_to_mp3.pdfIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_004c5f177e084f42a10121eede7dffea.pdf?index=trueIn PDF document text
    • http://vukapolil.rf.gd/2008_dodge_grand_caravan_sxt_value.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_off0000f0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C3 5232 bytes
SHA-256: 23b1052b4f529962d6108bd132aea34101abc53ad4bb1ab2ab4e5561e70fd900
font_01_sfnt_off00010285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10285 14804 bytes
SHA-256: 3ab68bd6e06cbcacf591b390ffb892c5d5d33bddb9bd624805efb54917488f56

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