Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f57abd80b8e54e8…

MALICIOUS

PDF

77.6 KB Created: 2021-03-15 02:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2154ee71048fe4a88b8c02edb1b8eb9b SHA-1: 5a2d2101e88142c961584277a5ab4f8e363757d9 SHA-256: 1f57abd80b8e54e8cf7d0fe5b368f0a6190867c347a9da658212791a8cfe01f7
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://maypoin.ru/award?keyword=alumno+definicion+pedagogica+pdf PDF link annotation
    • https://cdn.sqhk.co/kerutadit/chegihH/string_of_words_book_1_chapter_1_answers.pdfIn PDF document text
    • http://devedilazabu.medianewsonline.com/gst_annexure_1.pdfIn PDF document text
    • http://lenusabipowezo.getenjoyment.net/scooter_the_logical_song_mp3_320kbps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_60359c69bf93f.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/capitalization_in_finance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489983/normal_60245de82377f.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/jfgehf0/boo_2018_wiki.pdfIn PDF document text
    • http://bojukekaj.66ghz.com/fufufelojuvokotadawus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495691/normal_6032726ddc990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491157/normal_601ffc4dbfa14.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/iji49gi/zagumovepozowemeke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479917/normal_6046e02019014.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/jalhgH1/sketch_pencil_creative_drawing_ideas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kivabidugitu.rf.gd/arkham_knight_ign_guide.pdfIn PDF document text
    • http://zunepesojiwer.rf.gd/agilent_34410a_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/pejatavesivudubowu.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/chemistry_of_representative_elements.pdfIn PDF document text
    • http://wotixoweg.rf.gd/challenges_of_entrepreneurship_development_in_nigeria.pdfIn PDF document text
    • http://zuxulabawiba.rf.gd/multiplying_and_dividing_polynomials_worksheet.pdfIn PDF document text
    • http://tezegizutisijo.rf.gd/fegexinipo.pdfIn PDF document text
    • http://suzimisefodude.epizy.com/zuxetuvozis.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/fugasolelenito.pdfIn PDF document text
    • http://zukevajisuw.rf.gd/fufegurefinorobewitibumut.pdfIn PDF document text
    • http://panadokopejed.epizy.com/xonobikefipurafexipuweba.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_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 5192 bytes
SHA-256: c70e7be27f66fd7d41953c0c7611e759a6d64fe049a0408dbcd52df2002adfa3
font_01_sfnt_off0001005f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005F 12184 bytes
SHA-256: 9c78ab00057815f7e6429de46d25a9db924254585902cde047fc58d600d391de

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