Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecabc06a8046c32…

MALICIOUS

PDF

84.8 KB Created: 2021-01-20 10:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c0178edd3c61aaef8347b877ad0c614d SHA-1: e95574c28cb1e5dde9fa8264a6ba6edbd26baff3 SHA-256: 6ecabc06a8046c32e0be05b2113d12d23b1fab92d69a1d2b37e96714b0a5b443
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score suggest this document is a phishing or malicious redirection attempt.

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://traffine.ru/123?utm_term=how+to+raise+your+own+salary+summary PDF link annotation
    • http://lajulufubugo.22web.org/arnold_ehret_chomikuj.pdfIn PDF document text
    • https://tavurusifuta.weebly.com/uploads/1/3/0/7/130740255/zurelinijez.pdfIn PDF document text
    • https://site-1187178.mozfiles.com/files/1187178/fun_facts_about_animals_funny.pdfIn PDF document text
    • https://site-1243564.mozfiles.com/files/1243564/liverabajoti.pdfIn PDF document text
    • https://site-1171866.mozfiles.com/files/1171866/covalent_bond_naming_worksheet.pdfIn PDF document text
    • https://site-1171112.mozfiles.com/files/1171112/fandango_saxophone_sheet_music.pdfIn PDF document text
    • https://kofepuxola.weebly.com/uploads/1/3/4/7/134718869/6ee3aa.pdfIn PDF document text
    • https://petuxomurekag.weebly.com/uploads/1/3/0/8/130874153/7681786.pdfIn PDF document text
    • https://site-1168112.mozfiles.com/files/1168112/lamolixexefuwiwulekema.pdfIn PDF document text
    • https://polemezal.weebly.com/uploads/1/3/1/4/131452876/gixikemim_nisew_nagoje.pdfIn PDF document text
    • https://mafugefowodofo.weebly.com/uploads/1/3/1/3/131378796/325954.pdfIn PDF document text
    • https://zikamesezelili.weebly.com/uploads/1/3/4/8/134857079/309cdb3cb9fb6.pdfIn PDF document text
    • https://site-1168430.mozfiles.com/files/1168430/wiwowuwuwogadi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/roxawo/best_open_source_video_editor_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/articles_of_faith_songs.pdfIn PDF document text
    • http://wevaxelim.rf.gd/pearson_earth_science_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/amman_movie_tamil.pdfIn PDF document text
    • http://woxebolinos.rf.gd/jekam.pdfIn PDF document text
    • http://darajakejaxise.rf.gd/mewif.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000121a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x121A2 21044 bytes
SHA-256: eac868cd883c205e91a209bb23b49896f31ee9f5bef95c5eecb661df352fa4f7
font_00_sfnt_off0000e047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE047 4984 bytes
SHA-256: 83cecd3f990f96d32b9d857c85ae315b43f831790ae073a454cd430c462c8a07
font_01_sfnt_off0000f12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 2284 bytes
SHA-256: 5bae6048ce642e648ec0930c1b23cf937ee072ee10dfd0da5f1396ca5faa57ef
font_02_sfnt_off0000fbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAE 12132 bytes
SHA-256: 8161e7b9e6fb50d059da8c7c77ea843d7141c27aceb68e2a9b8f11b07f7891ef

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