Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7618cebd10e8c86…

MALICIOUS

PDF

75.7 KB Created: 2021-05-05 19:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 72d0a5a68beb2eb3b1ace67075cb7671 SHA-1: 5673690baa9c78de750511058f6f3019caad9866 SHA-256: e7618cebd10e8c862e938495b6cb7fea45332feb7c88c8e25366805b5bab2a22
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 0.9996

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://xezojetit.ru/strik?utm_term=ge+dryer+timer+knob+not+advancing PDF link annotation
    • http://itawegan.fun/xbox_360_slim_250gb_manualqixjs.pdfIn PDF document text
    • http://xufunuduxatene.iblogger.org/18566705459.pdfIn PDF document text
    • http://kmplitka.shop/12506833125l00nt.pdfIn PDF document text
    • http://todayit.pro/redimusukemokipigopitetiwwwxn9.pdfIn PDF document text
    • http://uniques.space/38318887890orxuy.pdfIn PDF document text
    • http://zufuruz.22web.org/sidegufupuzana.pdfIn PDF document text
    • http://vofimavotejaso.22web.org/62946823105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503767/normal_604132c9ca2d4.pdfIn PDF document text
    • http://kusawib.iblogger.org/nice_looking_tables_in_word.pdfIn PDF document text
    • http://helpverifybadges.com/daxusazqrew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427519/normal_60521dec66a23.pdfIn PDF document text
    • http://poxijirubulemax.22web.org/children_s_piano_sheet_music_numbers.pdfIn PDF document text
    • http://mklhhhh.space/71240339310hl2uv.pdfIn PDF document text
    • http://belkwigs.com/zizenumarekafolapojom27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2efabd41-1f95-43d0-8245-5f8eb9267247.filesusr.com/ugd/2f4ddf_58c90bb502d84797819c9ce7891ce491.pdf?index=trueIn PDF document text
    • http://vatimofaxemog.rf.gd/15393630630.pdfIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_5b1ed248a096466ca18af364ce8e2970.pdf?index=trueIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_03fd76ce3fee4498ab0ba2c9a6262e09.pdf?index=trueIn PDF document text
    • http://dofadedivuxira.rf.gd/complete_cfop.pdfIn PDF document text
    • http://lepalatibig.epizy.com/best_audio_editing_software_for_android.pdfIn PDF document text
    • http://vewetumizobu.rf.gd/is_aesthetic_only_visual.pdfIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_ae353cf4939a42d8a2ebbd94829725dc.pdf?index=trueIn 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_off0000ea13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 5448 bytes
SHA-256: e7bbac5645f593c954a5b3817ef54ddc99da24c5a9a7bd4314b2c7899dadcfc5
font_01_sfnt_off0000fc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 10456 bytes
SHA-256: 11e87ed222160914bbed49f466d6b74ee34016ab1af60c9d590877ec77d0aef5

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