Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf5182e2c398ecd…

MALICIOUS

PDF

76.5 KB Created: 2021-05-02 17:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 16a5a618b09fa40be2085721f4c6995e SHA-1: 32c33b2a1bd506f27f9e4cb79773b8936a6cfc7e SHA-256: 0cf5182e2c398ecdf35be5c1ea13efe3ae9f4c6a9d299f8804a773bb8a1bf373
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 0.9993

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://xajibur.ru/strik?utm_term=free+blank+periodic+table+worksheet PDF link annotation
    • http://sale20.site/savepopijetulitoluwoxoxap8bkiy.pdfIn PDF document text
    • https://tulalezosisab.weebly.com/uploads/1/3/4/6/134601470/fonasom.pdfIn PDF document text
    • https://vifaseberafu.weebly.com/uploads/1/3/0/9/130969816/xovumuji_gefonosedevozo.pdfIn PDF document text
    • http://static-start.top/kemuwyxq5m.pdfIn PDF document text
    • http://bt-management.website/angaraka_runa_vimochana_stotram_in_telugu27q1b.pdfIn PDF document text
    • http://youralteragoods.com/tom_clancys_jack_ryan_season_2_episode_2_imdb4ff1f.pdfIn PDF document text
    • http://fullhp.info/bilijanem3f1wt.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/gxjhuJ8/recargas_gratis_a_cubacel.pdfIn PDF document text
    • http://pumba.fun/xunitenipugafena1thty.pdfIn PDF document text
    • http://lynciguest.com/diablo_2_death_runeword_weapon07q5u.pdfIn PDF document text
    • https://nodararikerat.weebly.com/uploads/1/3/4/8/134885074/rajidovovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_6058ddfcb589b.pdfIn PDF document text
    • https://tedotedonux.weebly.com/uploads/1/3/0/7/130775879/1803809.pdfIn PDF document text
    • http://magnifioco.site/xaxutasu0z3j6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5fe4aad22104b.pdfIn PDF document text
    • https://cdn.sqhk.co/salasereki/yBbic6T/polojujipalagugowenuxigo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390659/normal_5fe396b016afe.pdfIn PDF document text
    • https://bemilinup.weebly.com/uploads/1/3/4/3/134390274/jureridazew_mabifoj.pdfIn PDF document text
    • http://lnstagram-helping.live/153686344215mxqg.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/ehciggi/88929896400.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/70aa3f81-9c52-4baa-82ed-6bc6f354b012/the_vampire_diaries_season_8_episode_8_bg_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7b22482-fbb8-4bf2-b35e-c32af8ef1bc3/what_is_the_average_salary_for_a_spanish_interpreter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5abf700-69bd-4cad-8323-112c618cc25f/nobinivojuxuxapadabosuju.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_off0000eb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB13 5412 bytes
SHA-256: 889350a3a1c8959bf4e1e8cb1aa7d56ff08b947f5667535ff2a62f49c8f79791
font_01_sfnt_off0000fd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 11108 bytes
SHA-256: 01f5231952aacbf68ffcaab5dcccf3ebd594a299cff846935b0db80f219d2fe8

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