Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e0bf63a3a74758…

MALICIOUS

PDF

79.2 KB Created: 2021-05-15 14:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d29840054bd666e94cf716fd3114c06b SHA-1: 70ece1a9c383e930ad87892868a7cccf61c3fe20 SHA-256: f5e0bf63a3a747588815c807943a96e2e6206ff510a56ade917708e954748f1d
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to potentially malicious sites, as indicated by the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics. The document body, though heavily obfuscated, suggests a lure related to sewing machine repair, which is likely a pretext to redirect users to a phishing or malware distribution site. The presence of numerous external URIs and link farm characteristics further supports a malicious intent.

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/strik?utm_term=how+to+replace+needle+in+janome+sewing+machine PDF link annotation
    • https://cdn.sqhk.co/pinepopowig/ihWhjjf/pottery_barn_christmas_tree.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/gh0Sicx/very_funny_tiktok_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/medijamowole/aphdYid/bafofonakekozizuwut.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/QhrhIhi/samsung_my_files_network_storage.pdfIn PDF document text
    • http://kurepez.22web.org/59343703595.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_16c27144162f4d4785248f0dd2a79896.pdf?index=trueIn PDF document text
    • http://gedapewubu.epizy.com/41133501400.pdfIn PDF document text
    • http://dimonejoxu.rf.gd/30574836214.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/tarugiju.pdfIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_26dcfa12a43f430a8c37da060a9925db.pdf?index=trueIn PDF document text
    • http://bebubizaguwadef.rf.gd/courage_book_by_osho.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dda5489-f813-4e4e-a0a2-4432fa6b1110/mutants_and_masterminds_freedom_city.pdfIn PDF document text
    • http://vurasoda.rf.gd/surface_area_of_composite_shapes_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1245ab8-de62-4807-bfff-f377280752ac/everstart_jump_starter.pdfIn PDF document text
    • http://bodufusuviv.epizy.com/17751831409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee6a8d8-af6b-472e-bf90-07ef31874ed2/binevarenetizusubowe.pdfIn PDF document text
    • http://zunedolu.rf.gd/kalanchoe_pinnata_medicinal_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/picsart_apk_new_version_cracked.pdfIn PDF document text
    • http://jolivawojo.rf.gd/95054425242.pdfIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_0bfee0a320e44d689ad9de83bf90b119.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxelula/easter_island_moai_read_theory_answers.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_off0000f6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C2 5616 bytes
SHA-256: 73b9104bb25ee8e5428dcd721de6b7faa40d19554e1c13c90cdc8e761fec6a94
font_01_sfnt_off000109c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C0 10788 bytes
SHA-256: 19758f652d37b4475556ca45efc227b042afa7179a4db43cef17b635a64ddbf3

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