Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8be8be095f3a62c…

MALICIOUS

PDF

89.3 KB Created: 2021-04-05 06:34:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3b760e3a37a4d8ac0d225eb5cfc734a4 SHA-1: 3f219c4c90e9d57253495f36b5a8d97a230166c2 SHA-256: b8be8be095f3a62c53bd4a8b268644214fff5b0919bb090e5932f18e3fc33406
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://jacksth.ru/123?utm_term=flyer+size+templates+illustrator PDF link annotation
    • https://cdn.sqhk.co/gedofovel/im5qja5/ptk_biologi_sma_kelas_x.pdfIn PDF document text
    • http://afracheat6.xyz/what_does_howl_mean_in_hebrewhigdr.pdfIn PDF document text
    • https://cdn.sqhk.co/xisapabo/n3chQgj/script_template_doc.pdfIn PDF document text
    • http://osmosiotzs.fun/beretta_92fs_compact_italianz2nme.pdfIn PDF document text
    • http://rm-swis-mine.com/rokoriparaditegifab6gvs.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/jicjcie/watch_nfl_games_live_stream_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/lexujowina/a1mThh8/fegikabazikixeluzoxutunu.pdfIn PDF document text
    • http://gunisone.iblogger.org/xofinigetadiwun.pdfIn PDF document text
    • http://trastqort.online/tegoboxineru029ai.pdfIn PDF document text
    • https://cdn.sqhk.co/sasibasodiwu/Qgfzjhx/vip_healthcare_services_moreno_valley.pdfIn PDF document text
    • https://cdn.sqhk.co/zagakobafot/ighe2xv/metal_slug_7_tiger_arcade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dc5ca969-d333-4582-9879-b719aca70d73.filesusr.com/ugd/760c43_a48ae313aadf4c3c9e935fd31eebed77.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bb2dd02-0912-4ce1-a2a4-4585534c056d/how_fast_is_20_nautical_knots.pdfIn PDF document text
    • http://tidizovebimike.epizy.com/comic_characters_in_pride_and_prejudice.pdfIn PDF document text
    • http://bozuguluro.rf.gd/can_you_make_sourdough_bread_in_a_panasonic_bread_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4630983-5755-4986-aef6-fb8ca1cc86cd/65530045295.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_e48431138d6e49db93528a12022c28d8.pdf?index=trueIn PDF document text
    • http://xaralitotido.rf.gd/kaxegojegarel.pdfIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_c91c6f33cf5a4708ba7345b38b332a24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c3fa75-3b04-446e-bae1-0e58aeba4496/69010464693.pdfIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_3b17c610a4d843e39818743f258866dc.pdf?index=trueIn PDF document text
    • http://xatabiraluxuded.rf.gd/international_ring_sizes_reference_guide.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_off00012117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12117 5072 bytes
SHA-256: 3430900629f802c0623523f0cc4c23be9633bfad42a7f3ff59defadb45b74b07
font_01_sfnt_off00013252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13252 11056 bytes
SHA-256: ee200971e2c42fd59e02fb3163aea2ccd91ebc0fb3e2a9d071a839f369c34299

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