Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e4120c9da4e78a…

MALICIOUS

PDF

84.3 KB Created: 2021-03-10 01:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 787d7ac347eaf58acc47e489bef7aeb0 SHA-1: d31d2b4bffd16a0d56b7f608237fd4115b2bdc8a SHA-256: e1e4120c9da4e78a349fd8b8c9a346b4bb56878fa965d54e3fc6cdad0f444e1f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The document body, though partially corrupted, suggests a lure related to salary information, which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://maypoin.ru/strik?utm_term=average+salary+of+an+international+business+major PDF link annotation
    • http://zogometemo.sportsontheweb.net/12878613937.pdfIn PDF document text
    • https://cdn.sqhk.co/rorefevobo/hesovg2/shark_attack_raft_game_online.pdfIn PDF document text
    • http://magnitoli-2ekran.site/ideal_tone_generator_amplifier_probe_kitdce4d.pdfIn PDF document text
    • https://cdn.sqhk.co/pulobegefuzi/ffgiI91/hero_knights_idle_rpg_mod.pdfIn PDF document text
    • http://hotsales-com.xyz/191841546960nhx9.pdfIn PDF document text
    • http://pelubexeto.getenjoyment.net/tower_of_babylon_ted_chiang_ending.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/adding_and_subtracting_fractions_with_unlike_denominators_calculator.pdfIn PDF document text
    • http://piriveva.scienceontheweb.net/wogunoxapufadojapatupavub.pdfIn PDF document text
    • http://jibakerutev.mypressonline.com/food_safety_jobs_new_mexico.pdfIn PDF document text
    • http://tujukesabegakom.mygamesonline.org/how_to_make_dark_green_by_mixing_colors.pdfIn PDF document text
    • http://scarcebook.com/launch_trampoline_park_hours_and_pricesry6s2.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/eN3ujcA/two-_way_traffic_phrase_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/dnheKgg/runadefo.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/frigidaire_top_load_washer_error_code_e2.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/ruger_mini_14_10_round_magazine_amazon.pdfIn PDF document text
    • http://stat-index-co.com/menologoritubekasoloxg860u.pdfIn PDF document text
    • http://zukirudon.mypressonline.com/soduxijunot.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/gggHibF/starbucks_autumn_menu_2020_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e443399d-34d4-41ca-9821-7eeebc1c8edb/41655234316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33049bf-8314-4926-aae0-9433eb554bcd/how_to_writing_paper_template.pdfIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_a241aef5762648aeb711d6f26297450e.pdf?index=trueIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_f76d830bc0a14de798c10a242a78db50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdeb7ee0-16a5-444d-b0a9-845ebbfcbcc5/zarataxuta.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_020798ea01784bccb4b97cee78230412.pdf?index=trueIn PDF document text
    • http://supuwevul.atwebpages.com/percy_jackson_son_of_neptune_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65201609-ee3a-4748-95c8-d75b343af606/dunkin_donuts_large_hot_coffee_with_cream_and_sugar_calories.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_0739e01d09aa470189132dd0ec9737df.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a925905-ee4f-46cf-9b59-f669d636ea22/strongs_concordance_217.pdfIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_289d8340f3ac4b07b972b0e54cc80d44.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB71 5336 bytes
SHA-256: e96c2cabcdc8557f842d94dcbb3ea9efab17a09c0d1bb07317c8dfdc6f6b7f53
font_01_sfnt_off00010d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8E 11488 bytes
SHA-256: 83f471c95b5c64ec74ae8a88b5423c3fb304ec20496bee16bc6be9fb8822bf50
font_02_sfnt_off00013465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13465 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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