Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b6517e6a1b8098…

MALICIOUS

PDF

77.7 KB Created: 2021-03-08 00:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 93ee009ad330f3813383b48404248781 SHA-1: b9671e4b6194acf927bf13a93c9967ee73b616a5 SHA-256: 14b6517e6a1b8098e61a9fc7b1190945eab66764f147dd647a69ef687284815d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing infrastructure. The document body, though heavily corrupted, contains text related to 'activity evidence of evolution worksheet answer key', indicating a lure to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=activity+evidence+of+evolution+worksheet+answer+key PDF link annotation
    • http://wodasewusinoda.22web.org/sharepoint_server_2013_tutorial_for_beginners.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/navy_seal_trident_on_army_uniform.pdfIn PDF document text
    • http://amst-watch-v1.club/ap_biology_campbell_10th_edition_test_bankghf00.pdfIn PDF document text
    • http://originalhallyu.com/art_and_the_bible_francis_schaeffer2s4e8.pdfIn PDF document text
    • http://limecash.xyz/11246619397qggvf.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/jolebanarivife.pdfIn PDF document text
    • http://wedavinonuvovu.22web.org/south_africa_drinking_water_guidelines.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sevaguv.rf.gd/75442158699.pdfIn PDF document text
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_6576458a1a0044b18f2e1006956dea96.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_9d899aaebbc64a82a38eadb58fedb4e8.pdf?index=trueIn PDF document text
    • http://winupenelipumo.epizy.com/24155421584.pdfIn PDF document text
    • http://kenumubozejofum.epizy.com/how_to_pair_motorola_baby_monitor_mbp36sbu.pdfIn PDF document text
    • http://zakefuki.myartsonline.com/41185781866.pdfIn PDF document text
    • http://keberugut.epizy.com/unconformity_geology_map.pdfIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_65a40572682b43948a17f0a972ef349b.pdf?index=trueIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_d00fde3dfc7e4c7dbad4e91ca480683b.pdf?index=trueIn PDF document text
    • http://bibuligo.epizy.com/trastornos_alimenticios_tesis.pdfIn PDF document text
    • https://33fe1336-4051-433c-b691-b763732126dd.filesusr.com/ugd/6c8f37_84fdbd03f2f344b2996e1bab5302e2c9.pdf?index=trueIn PDF document text
    • http://vuzinibijabu.rf.gd/firefly_2016_setlist.pdfIn PDF document text
    • http://galojuxutiwas.epizy.com/operation_iraqi_freedom_1911_grips.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_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 5416 bytes
SHA-256: 9a9f42b0ec32be7f54b2681ff946c77d95706c301f6ccfe053d5e19e6eb2342f
font_01_sfnt_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 10600 bytes
SHA-256: c40c840875d75b7bb7eb8a25a76f6d8dbce051ab36b93d1ac61a7dcd909dfd8e

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