Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dca66f158113ede…

MALICIOUS

PDF

76.7 KB Created: 2021-05-03 03:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7573e298a62d374b9140dadf242623a4 SHA-1: 9de8900394f61f591ec5eea691aa05da572921d5 SHA-256: 3dca66f158113ede1be116d9455fac490db5bf9be3427cedcbd6c416a0dc3221
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 0.9991

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://vilenefex.ru/strik?utm_term=how+do+you+get+lean+body+mass PDF link annotation
    • http://tasefile.22web.org/bafg_antrag_leipzig.pdfIn PDF document text
    • http://wesifugutedif.iblogger.org/medical_sociology_textbook.pdfIn PDF document text
    • http://vugijow.iblogger.org/que_es_un_catalizador_en_biologia.pdfIn PDF document text
    • http://rapegupuv.iblogger.org/history_of_typhoid_fever.pdfIn PDF document text
    • http://nunokulivot.22web.org/37775120225.pdfIn PDF document text
    • http://tokigarodam.22web.org/tuxozuvan.pdfIn PDF document text
    • http://lagegisujego.iblogger.org/kalejekobalivulabu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://durunorutap.epizy.com/south_movie_2018_new_hd_video.pdfIn PDF document text
    • https://0524119b-9543-44d4-a9c1-6a2a85ae2681.filesusr.com/ugd/b12506_094aad7498d14e6b84cc627217b98cb0.pdf?index=trueIn PDF document text
    • http://temadama.epizy.com/moxupuwojevudedirarep.pdfIn PDF document text
    • http://sedoguzod.rf.gd/50056446887.pdfIn PDF document text
    • http://tekaxebabix.epizy.com/free_printable_felt_board_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e6c36a-0623-4c13-8305-e35df3919590/what_is_the_theme_of_gone_with_the_wind.pdfIn PDF document text
    • http://tujefuguxofela.rf.gd/collision_reporting_center_toronto_hours.pdfIn PDF document text
    • http://kukosuluwab.rf.gd/58616642546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e40a06d-1b3f-434a-a186-e522942b09c5/50186198831.pdfIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_d073d70fcb284b7b9236b5c7bdfd90fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/72e39ca8-2f9e-4bb5-9cf0-a6069b4f489a/majason.pdfIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_15672004ed574f5a9d0f732b9726e9b8.pdf?index=trueIn PDF document text
    • http://ritanuwo.epizy.com/topshop_bralette_size_guide.pdfIn PDF document text
    • http://bamefifib.epizy.com/demonology_warlock_mage_tower_challenge_guide.pdfIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_f6fa6999aee44e94907817f2371d2e31.pdf?index=trueIn PDF document text
    • http://zilatinevosageg.rf.gd/arena_di_verona_programma_2018.pdfIn PDF document text
    • http://luwefotikejumu.rf.gd/feranavowigatasevolog.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_off0000ef1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 5344 bytes
SHA-256: 3e80c86a4cf7a9003d8459ed28bee65554431c5899ce8ef77fa7579ce99815d0
font_01_sfnt_off0001014d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014D 10648 bytes
SHA-256: c412dfc2f605a72c8929104d152b256913cdbe4d518f58812f9913c6068512ea

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