Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa3029ed4c8430c…

MALICIOUS

PDF

82.4 KB Created: 2021-04-02 05:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e34cac2db95a04b97592078d3b05ca23 SHA-1: 507e413f08e4b88e0ea82f147481671ec1ebd300 SHA-256: 8fa3029ed4c8430cc62fbee5c516c0d895b81d79e864fe1657c05d854a443f61
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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 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/123?utm_term=azur+lane+san+diego+guide PDF link annotation
    • https://zegekeli.weebly.com/uploads/1/3/4/6/134616407/mifelomedipoz_wataxudakomu.pdfIn PDF document text
    • http://pizolejotana.22web.org/gamabularakik.pdfIn PDF document text
    • https://julitigifoxa.weebly.com/uploads/1/3/4/3/134310533/kebifavaj-jenoregotanaduz.pdfIn PDF document text
    • http://lexibanoma.iblogger.org/maintenance_agreement_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_606638c62efc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474457/normal_5ff679e1eecd9.pdfIn PDF document text
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/e8bb37acf2979b.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://jarujoburisuw.rf.gd/asge_guidelines_anticoagulation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae16e2ea-2e35-4135-b243-c85f77a16cc6/the_hunger_games_movie_download_in_hindi_filmymeet.pdfIn PDF document text
    • http://vewajelawukos.rf.gd/english_words_malayalam_meaning.pdfIn PDF document text
    • http://xaguxebijop.epizy.com/34333900276.pdfIn PDF document text
    • http://kapodos.rf.gd/47955922441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e27b58-7260-43bf-91b1-67926a6cd650/wijivegofimofogiselipil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e6b472-55c0-4c0e-93cd-dc0fedc5e8cf/18247979816.pdfIn PDF document text
    • http://kovudefimure.rf.gd/46757245136.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 4832 bytes
SHA-256: 2fd7fb09df3cda93df7cfc03b62ff66d03c4a9e19188d7ab0d1f47b2e78e9777
font_01_sfnt_off00010669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10669 11880 bytes
SHA-256: d88d3da65ad1bdb0a214b968943de13b0fcb3ccdb5345bac727c9d172c9c921e
font_02_sfnt_off00012ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA5 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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