Malicious PDF — malware analysis report

Static analysis result for SHA-256 102f37c31f3146f4…

MALICIOUS

PDF

89.7 KB Created: 2021-04-07 15:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8581abf5353ab6c167af4cc29f677878 SHA-1: 20f2390c18ffc4731f19be71b9560724c05b49b1 SHA-256: 102f37c31f3146f4b370cd8e2392cb33d0764fd86594f02f14b1729df13041a9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document contains numerous embedded URLs, with a primary one pointing to 'xezojetit.ru', suggesting a lure to a malicious site. The PDF's structure and numerous links indicate it functions as a link farm, likely to obfuscate the final malicious destination.

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://xezojetit.ru/wix?keyword=vera+nazarian+survive+read+online PDF link annotation
    • https://cdn.sqhk.co/sonorizeluwi/ge7xERy/99063930477.pdfIn PDF document text
    • http://mifvideo.space/sample_nonprofit_bylaws0ca1n.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/ib9jejg/29079298871.pdfIn PDF document text
    • https://cdn.sqhk.co/jopuromug/hfhfMvY/jazorafuxelogeniruxagono.pdfIn PDF document text
    • http://merovew.xyz/19130045431pk2ac.pdfIn PDF document text
    • http://13millions.store/what_does_the_poem_fire_and_ice_meanpwwwq.pdfIn PDF document text
    • http://tersq.fun/flowers_for_algernon_theme_statement_answer_key44m51.pdfIn PDF document text
    • http://ideaita.fun/16365914679expph.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/iggjjhg/wowobumagu.pdfIn PDF document text
    • http://repochka.site/how_does_a_capricorn_man_test_youcclx1.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/0d2389c6-d5b7-4d16-8538-a8454cb4d70d/the_midwifes_apprentice_plot_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad2f9cd-73eb-4b52-8a14-46776c6a6c1f/what_is_the_difference_between_iata_and_icao_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/daily_activity_planner_template_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3063aefd-ab20-4ba2-8440-7250c56fd46a/liftmaster_8365w-267_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/602b58f2-a7d3-4e6a-99a4-382d8336ef7d/paworegodiwamuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632acb2c-6444-476f-ac4f-80b3425aa7d2/jojafew.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/the_chocolate_touch_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd0bb1b-9d54-453f-976b-f3acc9b239b9/how_do_you_calculate_your_life_path_number.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/naruto_ultimate_blazing_beginner_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7C 4892 bytes
SHA-256: b7bdb0dcb6dc9da2a6a9af6909b8de7d39f7387d7a2542c180289a8298cc7e0e
font_01_sfnt_off00011e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3B 11432 bytes
SHA-256: 235e975de4f51708db8cb83e64dbbfd9b93453b3e019812e0ac7bf7e058a7e57
font_02_sfnt_off0001455b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455B 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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