Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20fea817af7f7a9…

MALICIOUS

PDF

72.0 KB Created: 2021-06-07 14:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4bdc5a01a9f860a11cb3d306fce551ff SHA-1: c019dccc642a81b11cbde669e84091921b09b73b SHA-256: f20fea817af7f7a9623b7209d3d59e407b31238f82627b51ac4357f1cf36aea2
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://queure.ru/pbw?utm_term=passe+compose+and+imparfait+practice+exercises PDF link annotation
    • https://fekunifiso.weebly.com/uploads/1/3/4/2/134266639/tevunikovijob.pdfIn PDF document text
    • https://tatazopizen.weebly.com/uploads/1/3/1/1/131163492/923f0deb6.pdfIn PDF document text
    • https://minufufigazibur.weebly.com/uploads/1/3/4/5/134528603/xugurapimamisokibi.pdfIn PDF document text
    • https://lesapexif.weebly.com/uploads/1/3/1/6/131637780/5099872.pdfIn PDF document text
    • https://pefasuvut.weebly.com/uploads/1/3/4/7/134716349/wojulirow_sanowu_gipewixu.pdfIn PDF document text
    • https://xovomono.weebly.com/uploads/1/3/5/3/135345708/kalir.pdfIn PDF document text
    • https://pasukanat.weebly.com/uploads/1/3/4/4/134474220/zewivumim.pdfIn PDF document text
    • https://lesajevix.weebly.com/uploads/1/3/4/3/134318042/varegonugas_mapaxebuwerigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zekodunu.pbworks.com/f/demaranew.pdfIn PDF document text
    • http://mikabipi.pbworks.com/w/file/fetch/144432093/despicable_me_part_1_full_movie_free_download_in_tamil.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/w/file/fetch/144517650/call_of_duty_black_ops_2_cheats_xbox_360_invincibility_zombies.pdfIn PDF document text
    • http://gitixofipoxu.pbworks.com/f/how_to_install_anti_cheat_for_fortnite.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/w/file/fetch/144440469/homophones_and_homographs_worksheet_with_answers.pdfIn PDF document text
    • http://fijovolumi.pbworks.com/w/file/fetch/144723105/jezutemafafegapos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/048b9039-e5a6-4fb1-b818-d2155388f83f/92166651122.pdfIn PDF document text
    • http://foziwelisi.pbworks.com/f/86335506076.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144427869/anthologie_les_fleurs_du_mal_thme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bd197c6-75c2-4665-87e0-51905f67f50e/how_do_i_clear_netflix_cache_on_samsung_smart_tv.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/f/kabixemeg.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC0 5336 bytes
SHA-256: e36bf05f12b3971f9b4d0b9e66df7d70e44e8728cec3e80f9dd5d7e9a039eb3c
font_01_sfnt_off0000efda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 10620 bytes
SHA-256: cb765c9b1798aaab37bd08f7ea01d25b179b994eefb0a39c1deb34585401ec6e

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