Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b5f65eb19f90cf4…

MALICIOUS

PDF

81.8 KB Created: 2021-04-03 07:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e186efa23e63c27ae6a633b523a32655 SHA-1: db07af68f436c938669d61351db5aa4f345f445a SHA-256: 0b5f65eb19f90cf473696c8231ab3e2a49788cbd0bfbbd289f7aad587ae9f261
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 0.9998

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://baarspo.ru/strik?utm_term=delta+portable+mini+crib+mattress PDF link annotation
    • http://remont-kholodilnikov.website/29398567242rvw9p.pdfIn PDF document text
    • http://podeves.xyz/model_declaratie_deducere_personala_2018arfiw.pdfIn PDF document text
    • http://vvinorama.website/80339875726mh44n.pdfIn PDF document text
    • http://beautysss.site/74279115567o7cjv.pdfIn PDF document text
    • http://hookup682.site/bovafojedafaxavazenami9wni1.pdfIn PDF document text
    • http://resimpub.com/gabriels_inferno_release_date_movien16sv.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/4cFhihd/wbtv_breaking_news_gaston_county.pdfIn PDF document text
    • http://triple-doska5.club/the_snake_vs_block_addictive_gamesmjb6x.pdfIn PDF document text
    • https://cdn.sqhk.co/kojariwirip/c6hhaib/65741317736.pdfIn PDF document text
    • http://golden-bridge.pro/adobe_creative_suite_for_mac_price7woow.pdfIn PDF document text
    • http://daimontimur.org/duzisujeksow4.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedevatas/geja8ij/95193161017.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/SjhOICN/lava_battlestaff_rs3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5fd61cba99df7.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/real_love_test_calculatoroclfi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_6054399234035.pdfIn PDF document text
    • http://eagleaff.com/configure_netgear_gs116_switchi4c0j.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/a90b8227-734c-434e-9293-a1a3d034be83/what_is_the_beast_a_symbol_of_in_lord_of_the_flies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e22bb5-5cdf-4349-9789-1326b7402f4b/how_to_set_weight_watchers_bathroom_scales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ca5425-d964-4fea-a07f-cc9801658f1c/penuvagikal.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_off0001029f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029F 5220 bytes
SHA-256: 34ce4834d725f8d23d571bbd3c8eddd49846a11d5e9a22eb924143891d3ea826
font_01_sfnt_off00011448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11448 11176 bytes
SHA-256: 954118a1a8510e13673004bcc04eb0cda716b22d6eb979859cd44a040d9319cd

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