Malicious PDF — malware analysis report

Static analysis result for SHA-256 384ed2c2f3047c68…

MALICIOUS

PDF

74.0 KB Created: 2021-04-30 20:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 979f19e37b7260538dfa69a75ff68c40 SHA-1: e34f142010d514327140c4465a1c1e7f51c932f9 SHA-256: 384ed2c2f3047c684d36a4d8ef1c458a7e8c02d5e78f2d2bb73b56c8c4c060a6
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely employing a social engineering lure to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=how+much+money+do+you+need+to+start+a+pawn+shop
    • http://faceit.su/werufagekexuxodujjqqwh.pdf
    • http://vpntop.info/4553399323j2mx6.pdf
    • http://electriccannoz.club/35831128665yqe1c.pdf
    • https://cdn.sqhk.co/tusifefovozu/nicpZov/zig_zag_scooter_sharing_roma.pdf
    • http://studyweb.site/38558842184s54pv.pdf
    • https://cdn.sqhk.co/zotofoza/eljaXqG/alien_zone_raid_hack_mod_apk.pdf
    • https://cdn.sqhk.co/mujejadalale/41ghjjT/uc_browser_free_movies.pdf
    • http://livecopyrightverification.com/miller_thunderbolt_225_lead_endsjp8jd.pdf
    • https://cdn.sqhk.co/maxevurux/hbYgfWt/72996649061.pdf
    • http://kolomata.ru/money_wealth_life_insurance_freex4o51.pdf
    • http://serdyukov.pro/determiners_worksheets_for_class_7djruw.pdf
    • https://cdn.sqhk.co/lokabawopup/gfjalgc/miranda_lambert_songs_2020.pdf
    • http://urro-hu.com/laws_of_exponents_worksheet_grade_7dchn0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/80984931-c86e-4c39-9def-e3f7147fb298/rca_home_theater_system_rt2390.pdf
    • https://502f924d-676a-41b3-8220-87c01882f600.filesusr.com/ugd/5a20bb_cc3f7133fbdf4d53983e30fe7a73d4cf.pdf?index=true
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_3b4ea236e18f406b8c1385c62a22f64c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1d568bf7-5108-476f-86da-b4f8c707f3d8/garmin_430_waas_upgrade_cost.pdf
    • https://s3.amazonaws.com/jubiferekaka/the_isis_papers_the_keys_to_the_colors_review.pdf
    • https://uploads.strikinglycdn.com/files/2bab2230-6a14-4a1d-accc-1ea425645808/85335929595.pdf
    • https://s3.amazonaws.com/jalasilunaz/panevio_autobus_stotis_informacija.pdf
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_f29d29a4a96e4191a0445a1285726096.pdf?index=true
    • https://s3.amazonaws.com/savukojubusum/msvcp140._dll_windows_10_64_bit.pdf
    • https://uploads.strikinglycdn.com/files/2dfdc68a-d136-4343-a39c-af9b94c10619/samsung_ue50tu8507uxxu_50_smart_4k_ultra_hd_hdr_led_tv.pdf
    • https://uploads.strikinglycdn.com/files/a3a41825-b279-498c-b008-3e8fb977a4af/megofo.pdf
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_d082b79b83aa4e2180acef1cecb5f265.pdf?index=true
    • https://s3.amazonaws.com/nilafafakem/25016235815.pdf
    • https://s3.amazonaws.com/gonasidupij/mutagusoxanuwijebab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d94a.bin
16f6422c1230861ffb29cc4fac50deb4bac26a6995bc7c27d74df204edb6586d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD94A 5272 bytes
font_01_sfnt_off0000eb15.bin
ba0eecee3ed9836b4a7f0450db969acf76e9d5c828a31e89a7f845fd8ec63eb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB15 9640 bytes
font_02_sfnt_off00010be9.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE9 4324 bytes

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