Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5493e5f19ac41c5…

MALICIOUS

PDF

82.2 KB Created: 2021-06-10 08:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a87f129ba53398ca3f6d5b96a0e51f1e SHA-1: ebe5bf354d46bd9c0b82e15cbc3e6eba774e6b3a SHA-256: e5493e5f19ac41c5248bfd07f31d0b44e38b449859c8c99c32a16500cd159db2
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 0.9996

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://laborke.ru/pbw?utm_term=marathi+barakhadi+tracing+worksheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370273/normal_604cc0f432e67.pdfIn PDF document text
    • https://kugavibutatabo.weebly.com/uploads/1/3/4/6/134613496/9b17ad57c3433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459470/normal_6022cf26137ca.pdfIn PDF document text
    • https://zimavilagapiwe.weebly.com/uploads/1/3/2/7/132712623/zolejejomug.pdfIn PDF document text
    • https://ponitunol.weebly.com/uploads/1/3/4/7/134747778/sopanajizaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496005/normal_5fff47a96e27a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457011/normal_602c3ca6cb0dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_60314fdfd055d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d94b347-ffd8-4d27-b0c0-863add89d901/what_is_a_good_red_wine_for_beginners.pdfIn PDF document text
    • http://sapixesut.pbworks.com/f/amr_diab_2020_album_dndnha.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d007934-d471-49da-9d1d-6c2bc6169194/the_sea_of_monsters_ar_test_answers.pdfIn PDF document text
    • http://vedufid.pbworks.com/f/what_is_the_best_design_software_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/468aebc2-330e-4df8-bec4-fbe7b62abf7a/fahrenheit_451_book_vs_movie.pdfIn PDF document text
    • http://ririgifavem.pbworks.com/f/danny_phantom_season_1_episode_4_dailymotion.pdfIn PDF document text
    • http://wepoline.pbworks.com/f/fnaf_all_phone_calls_1_2_and_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e4e884-6fe4-4db5-b4c0-1e75b39eba22/vegurifomutupegi.pdfIn PDF document text
    • http://zoririlebo.pbworks.com/f/how_to_pair_logitech_keyboard_with_unifying_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2e0a0f-d6a4-4998-a224-3f3cb1aa19e3/17464902850.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144446178/vikujasewaku.pdfIn PDF document text
    • http://watusuxipidu.pbworks.com/f/how_many_grams_is_6_cups_of_powdered_sugar.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83F 3332 bytes
SHA-256: 13cb232e598c9afe38d2d42bcb75b6f07550fd67514772a5e6034a53128286c9
font_01_sfnt_off0000f431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF431 5472 bytes
SHA-256: b8b51f49f302ae7fa273ba184390a0583b631425f5edc0541bfe9d05bdf4ba67
font_02_sfnt_off000106df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DF 12300 bytes
SHA-256: 1ea0567a920f7b82d8555209603b87cb5c5f8ab072ea505d0ee79534bc897ef8
font_03_sfnt_off00012e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E73 3460 bytes
SHA-256: 99ec6ea96360b6b4a07d11d740dc7f7c764d665b9e4f8e46b660ca162bd4706a

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