Malicious PDF — malware analysis report

Static analysis result for SHA-256 546735b3ec9bab75…

MALICIOUS

PDF

105.3 KB Created: 2021-03-21 09:23:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b7bc8d480010e443920a52c6a7c22150 SHA-1: 4f58148536a628687cdf173b668ff7b769bb09ed SHA-256: 546735b3ec9bab758a6536d84c3b0d0e6fe89a196203bbf2d1db315710d9c599
126 Risk Score

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 0.9993

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://baarspo.ru/strik?utm_term=how+to+see+profit+on+robinhood PDF link annotation
    • http://rabizepafuxonag.mypressonline.com/wuvuzazujazupogamaribe.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/73455074825.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/2hdshiM/2116217817.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/parekumagugirigizer.pdfIn PDF document text
    • http://coins24h.com/57820993044w77o5.pdfIn PDF document text
    • https://cdn.sqhk.co/rovevexapag/Bja1Khg/community_places_worksheets_for_kindergarten.pdfIn PDF document text
    • https://cdn.sqhk.co/salulilo/X9jeQib/batukixelugelanejafud.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/convert_to_html_using_apache_poi.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/balanced_scorecard_4_perspectives.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/dhdmgdD/shark_attack_hawaii_statistics.pdfIn PDF document text
    • http://lowusonuraku.mygamesonline.org/how_to_write_a_macbeth_essay_gcse.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/coffee_shop_business_plan_free_download.pdfIn PDF document text
    • http://wide-take.top/internet_download_manager_full_indir8l09e.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/VbhhC2m/33594666089.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/oxford_dictionary_of_accounting.pdfIn PDF document text
    • http://krokoboko3.xyz/how_to_reset_hp_deskjet_2544_wifi_passwordupxc1.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/74549827942.pdfIn PDF document text
    • http://pozezan.mygamesonline.org/alan_watts_this_is_it.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/Ljb9cha/47792765343.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/JwhjijB/81519634740.pdfIn PDF document text
    • https://cdn.sqhk.co/gajerivab/ijihWjc/81823625959.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dogufisojorosef.epizy.com/68518837213.pdfIn PDF document text
    • http://xesijapapun.rf.gd/tumutagozigigokowusalen.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_off00015d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D81 5080 bytes
SHA-256: 128675ccb03735ea7caa7bb6857f76883d53daa600b96263d2235ae0886b8aa4
font_01_sfnt_off00016ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ECC 12096 bytes
SHA-256: ec2ede7fee4f693e8191562baa8c0c44bd82b2c85e7fcad89014a3c35eca287b

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