Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a69fc293a91d296…

MALICIOUS

PDF

76.2 KB Created: 2021-03-21 22:29:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ce35d6dc2fdea3e5a067419d089ec19b SHA-1: 980e8b154a0274b8a519903c5bc160b7009f0806 SHA-256: 3a69fc293a91d296f1a4f404d01df215e0c4e99d4897b2a7d41c13eb0d53f227
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://midufefew.ru/strik?utm_term=what+is+the+main+idea+of+antigone PDF link annotation
    • http://nonoxutiwi.mypressonline.com/duvusaxizodew.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/f3j7hbd/xexakuwupafisevefufi.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/legions_of_rome_mod5s3mg.pdfIn PDF document text
    • http://profoto22.ru/farewell_my_lovely_book_sparknotest4598.pdfIn PDF document text
    • https://cdn.sqhk.co/letabuner/hiiceib/myclasses_south_university.pdfIn PDF document text
    • http://kdghy.online/benim_hocam_fizik_video_ders_notlar4h2go.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5fe82934a94e0.pdfIn PDF document text
    • http://bobujopolodusol.mygamesonline.org/zomevevumalis.pdfIn PDF document text
    • http://sugakibabusu.scienceontheweb.net/encode_to_base64_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501810/normal_602678da64362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413567/normal_601297476f4da.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/mheY7KX/24775177334.pdfIn PDF document text
    • http://getallcreditscores.info/93297695404715mk.pdfIn PDF document text
    • http://pezinejotu.22web.org/innova_3100_scanner_reset.pdfIn PDF document text
    • http://remontnatali.ru/1128215398ty2on.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogonuvusawi.epizy.com/the_heirs_episode_2_eng_sub_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/xigevoret.pdfIn PDF document text
    • http://dekuravimej.epizy.com/subosoz.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/flowchart_template_microsoft_word.pdfIn PDF document text
    • http://retuguru.epizy.com/16502426647.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/dazupajidor.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/siwotozeroneponawezixun.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/medium_difficulty_word_search_puzzles_printable.pdfIn PDF document text
    • http://sabozet.epizy.com/xokefanufuxogofemezanobal.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_off0000ed4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4F 5204 bytes
SHA-256: 693612ceee80fe7b5298d0fcad6594dce70450799c8868c4f60b862a4fd5d34c
font_01_sfnt_off0000fef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF0 10556 bytes
SHA-256: 7dd073c4ac8509c613ca94bab82783e836adb71041cb0a59b8284ac82a7969fe

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