Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72058bce9184329…

MALICIOUS

PDF

78.5 KB Created: 2021-04-01 02:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b9cb4add20aedc524efd7ceffc1d4c3b SHA-1: 22d6c83464459a6001c70b40f6559015a9984e29 SHA-256: e72058bce9184329056595fa69bf9c41d6768bde9ffd7addb523ecd682d9ae55
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://zajinet.ru/strik?utm_term=wow+vengeance+demon+hunter+dps+build PDF link annotation
    • https://tedejewudokas.weebly.com/uploads/1/3/1/0/131070167/vafoteseredoxon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388060/normal_5fcb14c99694c.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/what_is_the_symbol_for_wind_on_the_weather_channel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_5fd907ca75c76.pdfIn PDF document text
    • http://kemikavar.mypressonline.com/38074439642.pdfIn PDF document text
    • https://zipawesijapa.weebly.com/uploads/1/3/4/4/134494223/notisepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494417/normal_60524f3710ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409627/normal_5fd3417841612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416660/normal_604fb050387e9.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/122fcf0f-3715-4c65-85c7-756dc1cca409/como_falar_bem_em_publico_youtube.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_bb847a6109784b9391f4b5b10f624131.pdf?index=trueIn PDF document text
    • https://bf5f3f24-cfb9-4aec-9f01-83e6d863dc5b.filesusr.com/ugd/1f4526_2f0dcf73fc9e4f6aa8833b6531c4a2aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2091e06c-7a13-4f3a-a879-19eb98c7dace/is_into_the_abyss_on_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/ruger_lcp_vs_lcp_2_380.pdfIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_6a68d2ec0d8348ddb2324b2eba6eaf20.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/african_wild_dogs_eat_human.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_60151b95be754fddb48db157b8691136.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezude/87795810917.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_off0000f444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF444 5792 bytes
SHA-256: 2bbcdbd4a03ef6afd25bc5328a53049281b75d0e454284e2a7b6217b944b7cfe
font_01_sfnt_off000107e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E9 10836 bytes
SHA-256: 7f9f46cee7ea47687a6f249ac3ad6038de2fc3a170782a5f5c57998e9c819644

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