Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e744162471b1928…

MALICIOUS

PDF

81.1 KB Created: 2021-03-10 16:18:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 55993e5cd3d374e6ddc30e2d59aa7436 SHA-1: 184b9d6d4af224ab6d76f66c2ad633994afc743c SHA-256: 8e744162471b1928a7c55993b65b37fc8da4e20b94b2501e6f8519f7b04b80ae
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 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=1byone+antenna+manual PDF link annotation
    • http://rujawobezixevib.iblogger.org/placement_of_beaver_badges_on_uniform.pdfIn PDF document text
    • http://xtreme-sport.ru/35310908663dx2ge.pdfIn PDF document text
    • https://cdn.sqhk.co/vuguvorexi/eJeesgd/pokemon_anime_2019_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/ijnqmhe/install_lightroom_presets_on_iphone.pdfIn PDF document text
    • http://citrus-fruit.space/50_shades_of_grey_author_website2gn9m.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/41304651845.pdfIn PDF document text
    • http://cadenalia.com/tesla_model_3_long_range_upgradesbhwp.pdfIn PDF document text
    • https://cdn.sqhk.co/wikepijosipi/cgdjbjd/87974375187.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/jakakudenisazezetim.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/how_to_fix_low_compression_small_engine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zesixefe/lonely_planet_ebook_usa_west_coast.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/arquimedes_de_siracusa.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/51163820407.pdfIn PDF document text
    • http://dedufaga.rf.gd/tabla_de_conversion_milimetros_a_pulgadas.pdfIn PDF document text
    • http://dezezefisimel.rf.gd/52443819501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af0b942-33be-4598-b5e2-378a49d02744/gifovadubunugimoto.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/kakiwaravutunoxodoguj.pdfIn PDF document text
    • http://fawikinego.myartsonline.com/varavuwabubupibagufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33bfcaa6-3b52-48cd-b70e-12e1ee8dbc73/81984240114.pdfIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/lazuguwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c0cbc5c-8dbc-40c9-af4e-245fc3a8d727/najawilalol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/011e42d2-f9b4-40fd-ad09-171f61d420e0/73845316547.pdfIn PDF document text
    • http://wimidisa.epizy.com/car_racing_games_3d_sports_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c3118c7-cdb7-46ef-8fb5-2205794e189c/html_css_website_design_tutorial.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF1 5544 bytes
SHA-256: e80b215ff122080aad1e1301c6673d01b6b9017c8b010188d124b8fcda937c30
font_01_sfnt_off0000ff1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1B 4756 bytes
SHA-256: 407ac9a439136138a4b757ca1ccbed9ac7931956b5793bd9bfe1a1a3ca2ee386
font_02_sfnt_off00010f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F45 11284 bytes
SHA-256: 4e9bdd8acfb71bb10f78a904e800d6899605df9a206c9cbbbdf1bfd4e18383dd

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