Malicious PDF — malware analysis report

Static analysis result for SHA-256 888fe19fb46327ac…

MALICIOUS

PDF

89.8 KB Created: 2021-03-06 00:53:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03bc34b0d63d34e809b47a598d41c72b SHA-1: 9ad8e4abfee239296ce4e781adc3ffa1173cd6ac SHA-256: 888fe19fb46327acdfaf078d2834334af841136c34b0489d40912743b3f151ac
126 Risk Score

Malware Insights

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

The PDF is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, including one pointing to a disposable hosting domain, indicating a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to song lyrics, which is a common tactic for phishing documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://midufefew.ru/123?utm_term=aarti+rehras+sahib+lyrics+in+hindi
    • http://wiinorama.fun/download_stickman_legend_of_survival_mod_apkqdu6n.pdf
    • http://nesegejisivinu.medianewsonline.com/old_school_rectangle_pizza_recipe.pdf
    • http://iranianvc.com/bose_qc15_battery_cover3crf4.pdf
    • http://burrrhey.tech/zitejojixesuzxkdf0.pdf
    • https://static.s123-cdn-static.com/uploads/4459025/normal_5ff665bd609cf.pdf
    • https://static.s123-cdn-static.com/uploads/4376850/normal_5fe02e93bfe5a.pdf
    • http://musc-media.xyz/holy_quran_english_translation_yusuf_ali4sk18.pdf
    • http://reactivaperu-2020.com/calculus_problem_solver90ci0.pdf
    • https://static.s123-cdn-static.com/uploads/4420602/normal_5ffb48f65955f.pdf
    • http://servisvds.ru/where_is_the_engine_coolant_temperature_sensor_locatedtivlm.pdf
    • https://cdn-cms.f-static.net/uploads/4419836/normal_601411b9466f4.pdf
    • http://trelon.fun/jakowee0sme.pdf
    • http://worldhold.online/48_laws_of_power_free_download_iphone72bi2.pdf
    • https://cdn.sqhk.co/jigitovewuk/ifYBPic/riwifepujututifop.pdf
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5fe0e8a23b654.pdf
    • https://cdn.sqhk.co/mutuwatu/gCid2el/okra_and_tomatoes_canned.pdf
    • http://mobufuwiwid.medianewsonline.com/64483283391.pdf
    • http://zuzorovix.scienceontheweb.net/king_lear_act_2_scene_4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://xobebol.onlinewebshop.net/what_is_the_theme_of_letter_from_birmingham_jail.pdf
    • http://kipejefanowisu.atwebpages.com/jaybird_x2_earbuds_replacement.pdf
    • http://pudosuvosav.atwebpages.com/66915483676.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fab7.bin
6281d3183d4fdb64c2f2f08e30d2979702555961ac8f8b556bf6d23d13ec8b48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 5256 bytes
font_01_sfnt_off00010c92.bin
eb903a4bcabb0673128613fc2c6a3b3be6b6be0204d11159aa2f590e1d82ee93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C92 3740 bytes
font_02_sfnt_off0001180b.bin
a9f9a4065b96699d40a9d2d5d2d08600c9b0721297c2e17cca86b711567ca695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1180B 10892 bytes
font_03_sfnt_off00013c6e.bin
b8669c16c9900661e21a036967d8836b62103a8b029a880e079aa298f6cd8d9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6E 3468 bytes
font_04_sfnt_off000149d2.bin
80e8d9f62da31e6ba610ec6e1d29bb7cd4c4ee0dee9c121f1528a60bf9709264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149D2 6036 bytes

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