Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48f8e7f68872ed8…

MALICIOUS

PDF

81.4 KB Created: 2021-03-24 21:53:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c1037b212ed2edc85ec644b699359e66 SHA-1: d71dbd0bb992f0c764e45f6fef3cb5002ff2bc7c SHA-256: b48f8e7f68872ed84946a7799344475e27662a520029916eec21c6dddb819acb
126 Risk Score

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 0.9990

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://nipisod.ru/strik?utm_term=aviation+weather+app+android PDF link annotation
    • http://bioforce-co.site/zipakulosakutowuriduzime76zh8.pdfIn PDF document text
    • https://cdn.sqhk.co/norejasiwiza/fvnjf3K/cookie_swirl_world.pdfIn PDF document text
    • http://cupe1.ru/sway_michael_buble_sheet_musicwyaiy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487626/normal_60160cfab6e05.pdfIn PDF document text
    • http://tasigezagu.scienceontheweb.net/absorcin_de_medicamentos.pdfIn PDF document text
    • http://strapslap.online/2146604943hsk4l.pdfIn PDF document text
    • https://cdn.sqhk.co/vebudirepo/jiertjf/crazy_shopping_game_mod_apk.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/remogalesebebefatanifefuj.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/ibjc0gj/24716900548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_6020a728085c6.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/dbjabp7/menokugukopipelefadiroma.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493549/normal_5ff5b4a24aa15.pdfIn PDF document text
    • https://cdn.sqhk.co/tojegaxamox/ggQ570W/wedeva.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/sharpening_stone_kit56av9.pdfIn PDF document text
    • https://cdn.sqhk.co/kefivaxepaj/dibhwif/egg_wars_minecraft_download_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_601f8d0213694.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459166/normal_5ffea5dd613e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/electrical_and_magnetic_properties_of_nanomaterials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6080fb-f314-4854-8713-35101e8e88f7/is_the_book_of_mormon_suitable_for_12_year_old.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc9b68f9-35fb-4dec-9d63-1c89566058c3/is_the_odd_thomas_movie_on_netflix.pdfIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/jurexajotupubakafozuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ef3b8a6-dacd-4666-a7d1-5d918ea80888/51204408283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d847ee6-a7c7-4d12-87b2-4c9ef6ad57bc/where_to_buy_a_halligan_bar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a3bd47a-d12f-4257-a701-b34e151d1bf5/vixopapa.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_off0000ffdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDC 4976 bytes
SHA-256: 2979ec47b00502a867a8ef961c9e5ff0a8e9c13ae04d5703f76bd37a3203df8e
font_01_sfnt_off000110da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DA 11452 bytes
SHA-256: 0e0ee262a6451b8df954a6fd296c101a4a7bca271b1b2a7e0e5ecc5ed6919cc6