Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb2583d05b4c722…

MALICIOUS

PDF

71.9 KB Created: 2021-03-18 06:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 13387d8f73ae894c2c17db149ce7dfc7 SHA-1: 99e0555789a627bc347363d5dd7c825c2389a826 SHA-256: 6cb2583d05b4c722eabbfdb0dc294aad6d28180166912aba833e594c2ebb9404
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 0.9997

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://vilenefex.ru/wix?keyword=aukey+table+lamp+india PDF link annotation
    • http://maska-respirator.shop/find_words_within_words_game0p0ev.pdfIn PDF document text
    • http://gromstroy.com/9353936896zkv5k.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/how_to_find_slope_of_secant_line_given_two_points.pdfIn PDF document text
    • http://dutarotanazosuv.medianewsonline.com/london_tourist_attractions_map.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/reinforced_concrete_design_lecture_notes_ppt5he7j.pdfIn PDF document text
    • http://verenica.net/38558797948wfktq.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/85504885051.pdfIn PDF document text
    • http://marinarus.space/410471101583k6oy.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/e3a40fa1-5c77-43ac-aa64-c213941581bb/computer_networking_a_top-down_approach_featuring_the_internet_8th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/junie_b_jones_and_the_stupid_smelly_bus_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc2d085-8cb7-435b-8f0f-1fe6460b2b16/4269162507.pdfIn PDF document text
    • http://tezebidurob.epizy.com/41219581216.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/karle_baby_dance_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9acd143-bebc-47f0-96bf-746ec34fb8a8/gagurewego.pdfIn PDF document text
    • http://gixosuwali.rf.gd/56770234088.pdfIn PDF document text
    • http://mokupemoraworal.epizy.com/sprout_social_reporting_api.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/760e0bb8-4f20-484a-bf1d-120c28b252b8/ashrae_handbook_fundamentals_2017.pdfIn PDF document text
    • http://fepoxojosatomu.epizy.com/killer_instinct_super_nintendo_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4f2f6f1-eede-4f9e-8cf3-db558cab2f43/79875592469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d49d1a-7d67-4636-b72d-26a810c4982b/la_doctrina_monroe_y_el_destino_manifiesto_resumen.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/how_to_use_crackle_glaze_ceramic.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_off0000d9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D4 5128 bytes
SHA-256: 04ea3728b8adb2ae4cb5575249df8dd2f41e2dcec8bb52e434bb7ef2b1a16751
font_01_sfnt_off0000eb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3F 11536 bytes
SHA-256: 61d23df6116cebba01f08cd843d0136146b551a56133ae06b40107e9adf47689

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