Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7449f7f87c2270b…

MALICIOUS

PDF

74.3 KB Created: 2021-03-22 11:20:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 54522bf92f2e8905bcc04a36b8d83590 SHA-1: 169a335e5afb83767ed75277ff7eb293b88d3432 SHA-256: a7449f7f87c2270bf2086851d2fdaba6f3bf83fafbd9d8e67f0567eba9a3e945
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://botokaw.ru/123?utm_term=bowerman%2527+s+nose+formation PDF link annotation
    • https://cdn.sqhk.co/zikonidenijo/jjgXieV/download_real_cars_online.pdfIn PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/goxabi_xuninavowig_pidusewewavomi.pdfIn PDF document text
    • https://cdn.sqhk.co/nafadurip/eUicgiU/fitamotimo.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/ahcJjdw/speedway_challenge_2020_full_apk.pdfIn PDF document text
    • https://kowepesabileb.weebly.com/uploads/1/3/4/6/134635017/ec59a4.pdfIn PDF document text
    • http://repair-monokoles.ru/garmin_mini_dash_cam_overheatingc6p3j.pdfIn PDF document text
    • http://fakibukilab.22web.org/sinking_deep_hillsong_piano_sheet_music.pdfIn PDF document text
    • http://zezarujewida.iblogger.org/how_many_calories_in_a_small_iced_caramel_macchiato_with_almond_milk_from_dunkin_donuts.pdfIn PDF document text
    • https://matixibufi.weebly.com/uploads/1/3/0/8/130873880/getukexujigegebakiga.pdfIn PDF document text
    • http://sberbank.services/8608286560739mpg.pdfIn PDF document text
    • http://zaruxejubo.iblogger.org/26132340994.pdfIn PDF document text
    • http://itnegozio.info/why_is_my_hp_envy_4512_not_printing_in_colorrbt74.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/VtjiFhg/splashlearn_parent_connect.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/00fc20cb-566f-4fba-8ec7-4f3b9dc0fa7d/ssis_2012_tutorial_step_by_step.pdfIn PDF document text
    • http://dorofudi.epizy.com/cyberpower_cp1000pfclcd_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6126c3-d336-4044-a9ea-87ca9a515aa3/nortel_m3904_quick_reference_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06003d65-dbd5-409c-a698-0b7833b5b28f/what_do_the_symbols_on_sd_cards_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/what_time_do_us_stock_markets_close_today.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/tebisipojejux.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/gabaveviverukasepawijuvu.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_off0000e6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B5 5056 bytes
SHA-256: 931c29b29a172d8f0313cd8687e661892e2472ac9d0ab68a79098d4d5bd8f344
font_01_sfnt_off0000f7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E3 10648 bytes
SHA-256: 8347dea906310cc8355b8832270b2712b636db1ae63eab0db7c2b8eb9d463979

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