Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d421b4db83a7df…

MALICIOUS

PDF

67.4 KB Created: 2021-03-24 03:38:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b255453b49d30f2879cb42d3a40a257f SHA-1: 3271725e822da6fbc74e706a7a44ab9cac9f4a17 SHA-256: e5d421b4db83a7dffe381f25efa91f54dc92604422bdcbbc53a8a9f9588f5207
126 Risk Score

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 trojan. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an intent to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm strategy on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/wix?keyword=adjacent+angles+on+a+straight+line+worksheet PDF link annotation
    • https://cdn.sqhk.co/dodamewope/jfemjjJ/developer_options_android_s7.pdfIn PDF document text
    • http://insurancecarusa.com/woxedexokexeniri4h6qn.pdfIn PDF document text
    • https://cdn.sqhk.co/visipapafef/p96dd4b/74631528251.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/WT7o2uu/72981838825.pdfIn PDF document text
    • http://nonly.xyz/toshiba_flickering_screen_problemu57dp.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/6giX90C/mango_smoothie_bubble_tea_calories.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/formula_para_convertir_de_pulgadas_a_cm.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/ponenosusanekamaji.pdfIn PDF document text
    • https://cdn.sqhk.co/kavonalitego/1ggX6jh/lixefupamemedafudalez.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/ezegehe/the_floor_is_lava_host_death.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/what_is_the_start_of_arthritis.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/HKiahgL/cossacks_motorcycle_club_wiki.pdfIn PDF document text
    • http://uspeh.icu/zasokikena0m1u8.pdfIn PDF document text
    • http://ionatr.fun/5250076886447b5a.pdfIn PDF document text
    • http://kazexajisodibu.medianewsonline.com/mavibomit.pdfIn PDF document text
    • https://cdn.sqhk.co/lexewagoz/q9Bggjd/colornote_notepad_notes_download_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/76370475899.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/baahubali_movie_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29d43db-bd51-42cf-a1a5-b3c846ea50f1/how_to_draw_realistic_portraits_step_by_step_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0342305a-b899-4c39-a36b-6bb2c12e79b4/graco_magnum_x5_electric_airless_sprayer_review.pdfIn PDF document text
    • http://zibelasavu.atwebpages.com/37948698774.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/antepartum_haemorrhage_management.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/petit_prince_ma_rose_est_unique.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/how_to_connect_my_brother_printer_to_my_computer_via_wifi.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_off0000c9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EC 5420 bytes
SHA-256: ae1ad5531dd0e0d36914393fe4dc4b748b4b03a9f0ee4ed56e434dfa6b24aa43
font_01_sfnt_off0000dc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC68 10264 bytes
SHA-256: e2ca21de201e98aa8bfaa4d0038fb363dfc42f8c85136cdd89c240a1cbedea5c

Open this report in the interactive analyzer, or submit your own file for analysis.