Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7a0f94f68839ff…

MALICIOUS

PDF

83.7 KB Created: 2021-02-15 19:25:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fe740048c49471ef7fd3357b77803077 SHA-1: a6d2bfc5344d415652a2cf181080adb44f7523f0 SHA-256: ae7a0f94f68839ffa258c6dcef7d38da8f91f97b61af5a38514faaba12914588
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://leonvi.ru/wix?keyword=ge+advantium+120+microwave+installation+manual PDF link annotation
    • http://manekobe.22web.org/chocolate_factory_movie_tamil_dubbed.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/BidIJhj/tamil_police_radio_ringtone_mp3_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fe0d8d3941af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386087/normal_6002b3590527f.pdfIn PDF document text
    • https://nulokedebuzeb.weebly.com/uploads/1/3/4/3/134310318/e99bde53d292.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/939e3de26c.pdfIn PDF document text
    • https://fanamavikere.weebly.com/uploads/1/3/4/6/134610997/8498432.pdfIn PDF document text
    • https://xasonametig.weebly.com/uploads/1/3/2/3/132303127/97844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_60243dbd537dd.pdfIn PDF document text
    • https://mulomaninivoxom.weebly.com/uploads/1/3/1/4/131437045/3546321.pdfIn PDF document text
    • https://fizegebukuri.weebly.com/uploads/1/3/1/4/131453213/b94de311f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421641/normal_601ec9155b5bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuxekijonudi.epizy.com/happy_anniversary_pic_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/cage_number_full_form.pdfIn PDF document text
    • http://robebiwasufilu.epizy.com/31387840998.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/dopafozemokudilifep.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/baal_veer_episode_834.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_off00010a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A75 5596 bytes
SHA-256: f88a480bd12a391ee2312531e10aed4c42f4e4f9f994dcc9ae23d10706c0171a
font_01_sfnt_off00011d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D80 10492 bytes
SHA-256: 47d36e88ea98b1b022d1738af81005a5fd0712c0c9b84ee9d8aee696590e1702

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