Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b504aefa2bd7f9f…

MALICIOUS

PDF

89.8 KB Created: 2021-03-17 10:06:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3870cd72d14c1f97343b5e5485da2621 SHA-1: 9015af615ed13aa4eff33fb1268d8a0837c5d489 SHA-256: 2b504aefa2bd7f9fd1071e0537330aeb2df6ccf6af150848b22019bb3335da6f
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 0.9995

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://golowaki.ru/strik?utm_term=what+is+newton%2527s+second+law PDF link annotation
    • http://santand-es.com/are_door_bouncers_bad_for_babiessamv6.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/agdUFD5/yellowstone_season_1_episode_3_summary.pdfIn PDF document text
    • http://copyrightproblem.com/932065355799xftl.pdfIn PDF document text
    • http://counterman.ru/52760749796c767c.pdfIn PDF document text
    • http://sodaapp.pro/57796720483o8wmq.pdfIn PDF document text
    • https://cdn.sqhk.co/patemugimej/Qihhegi/legends_of_heropolis_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xoguvamev/xihdjbq/welcome_banner_template_powerpoint.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/LPDRhjp/offline_pc_games_free_download_for_windows_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427820/normal_603501d5216c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486758/normal_6046ff6d1fb0c.pdfIn PDF document text
    • https://cdn.sqhk.co/kalusoxat/jb4Wdih/most_viral_video_games.pdfIn PDF document text
    • http://5coupons.info/eq2_conjuror_guidebv19m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/519d6ae1-b18f-4acd-b6b8-ef4184680c10/what_is_26_inches.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/rte_tv_guide_listings.pdfIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_bc8800a76c664f29ac9c296979cca03b.pdf?index=trueIn PDF document text
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_31ada3df68d34dd59496a726598767e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/devorah_lev_tov_robb_report.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_21e8594f9bf54563b18409df2ee8568d.pdf?index=trueIn PDF document text
    • https://bc570c78-db34-4367-8d24-30e931dee1d1.filesusr.com/ugd/2d1648_2f86aff14ff94065812b98a2ae1b1694.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cf68282-86c9-4638-ba00-8ca81b48c42d/is_arbonne_a_pyramid_scheme_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/wutosebilekexamesi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B16 5072 bytes
SHA-256: c4ac8d87aaeb81687528abe191fc6540914b3b574fb3b0903ed42fa8f1998d32
font_01_sfnt_off00011c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C72 11668 bytes
SHA-256: 594de25593a68ca1e246b6eb2e765ec2a7f507c21fca9c849eb5b21596bc0f6e
font_02_sfnt_off00014406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14406 16128 bytes
SHA-256: d44d52ef66720e7299aa23375668eb807971917d9a72a2eac4a2c392e38f6666

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