Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab855ae9afad8be9…

MALICIOUS

PDF

81.9 KB Created: 2021-03-17 02:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ee77755bcd971c2139576bc31cedf229 SHA-1: b7876376536867501c6d4a2cb9ed4ad3675ba872 SHA-256: ab855ae9afad8be979da8b5c0f83ad41ec2c0d78d410164d6c4a1acc8d704316
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to various domains, many of which are flagged as suspicious or unknown. The ML classifier strongly indicates maliciousness, and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggests a deliberate attempt to manipulate search results or host malicious content. While no scripts were explicitly extracted, the presence of many external links suggests the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=articles+and+conjunctions+test PDF link annotation
    • http://com-copyrighit.com/87787053607yj42s.pdfIn PDF document text
    • https://nuxutesinof.weebly.com/uploads/1/3/1/4/131437012/20fd079af.pdfIn PDF document text
    • http://lishop.site/61408534428yhox5.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/luwuputesateminujedhqhvh.pdfIn PDF document text
    • http://gopikosumusaroj.22web.org/petovemeresot.pdfIn PDF document text
    • http://g2am2e.xyz/28233840826swd1g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488323/normal_6016e6d54818e.pdfIn PDF document text
    • https://wetusaseri.weebly.com/uploads/1/3/5/2/135297966/lifitigawapoxu.pdfIn PDF document text
    • http://zekamuwafevero.iblogger.org/sallys_baking_funfetti_sheet_cake.pdfIn PDF document text
    • https://xexafuru.weebly.com/uploads/1/3/1/0/131070851/mapeveda_tikejuwalet_jiwuloradimu.pdfIn PDF document text
    • https://zobojosapez.weebly.com/uploads/1/3/1/4/131483592/rozenogenipisod_zanituriw_xaxaxewutejafoj.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/8804718.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481825/normal_5fe2872632d9b.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/tapefivibuno.pdfIn PDF document text
    • http://spain50off.info/invitation_card_for_conference_template16454.pdfIn PDF document text
    • https://magojumenuta.weebly.com/uploads/1/3/4/3/134361537/pirutuwude.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sukokovevaz.atwebpages.com/tex_to_miktex.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/11th_bipartite_settlement_for_bank_officers.pdfIn PDF document text
    • http://tuxefefili.epizy.com/certificate_of_compliance_electrical_work_nsw_template.pdfIn PDF document text
    • http://sabinozugi.epizy.com/pojakax.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FA 4880 bytes
SHA-256: 054d23ca155a26f16991aaabae10c8bda5b9d34d2d72d53810038713aa0022f8
font_01_sfnt_off00010892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10892 10376 bytes
SHA-256: 06ebf47e2437c1aef8f3258f71a8ac362588f6b3cf186c31c2e31ca52122a119
font_02_sfnt_off00012c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C17 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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