Malicious PDF — malware analysis report

Static analysis result for SHA-256 a077de87dcf49931…

MALICIOUS

PDF

83.5 KB Created: 2021-05-06 10:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5ae0cc0bfb6b9b9d00456b123785915b SHA-1: 034ab8a10799d8062f52f2a8bda18e08ca45adda SHA-256: a077de87dcf499310ee38ef77e616be18245faf050c989bf400c3aa0a6171bff
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a high ML classifier score indicating maliciousness. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution intent. The document body, though heavily obfuscated, contains text related to job earnings, likely serving as a lure to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://botokaw.ru/strik?utm_term=how+much+do+safety+technicians+make PDF link annotation
    • http://zeropium.com/165286540629z6k7.pdfIn PDF document text
    • http://recepty-dd.info/jomizilalipupetazcb0x5.pdfIn PDF document text
    • http://getcabinets.xyz/asmaul_husna_adalah_nama-nama_baikbczii.pdfIn PDF document text
    • http://umkatrade.ru/avengers_x_reader_burdenu74zy.pdfIn PDF document text
    • http://kungfumalibu.com/potenuvaririjumevj9w8.pdfIn PDF document text
    • http://7lessons.site/mufokotibigakouv2i0.pdfIn PDF document text
    • http://amorexpo.com/vupulebetizonas02e16.pdfIn PDF document text
    • http://xugafigipi.22web.org/manualidades_de_navidad_con_papel_lustre.pdfIn PDF document text
    • http://wiinorama.fun/genie_pro_max_remote_appto7oh.pdfIn PDF document text
    • http://pshcomonhere.xyz/86873358436aat29.pdfIn PDF document text
    • http://comforfemj.fun/how_to_type_alpha_character_on_keyboard_windowsljuii.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/kevava/all_amman_video_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc2c487-271c-4edc-a86a-736306a7601d/rofowalose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99bdb64-59d8-45cb-8190-c58c458e639c/lixoweweramipakasapab.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/python_machine_learning_raschka_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/46473479490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f281f9-a0b5-4507-be33-37ed71064d39/86887087391.pdfIn PDF document text
    • http://binuxusegewake.epizy.com/what_genre_is_fifty_shades_of_grey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1554c938-e7b8-4175-aed0-b42a2b9d05df/bd_price_of_hp_probook_4530s.pdfIn PDF document text
    • http://divapikej.rf.gd/can_i_play_metal_gear_solid_3_on_ps4.pdfIn PDF document text
    • http://gulavutimomoxu.rf.gd/sizanegam.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/information_security_analyst_day_in_the_life.pdfIn PDF document text
    • http://jorunodup.rf.gd/subep.pdfIn PDF document text
    • http://jilabof.epizy.com/pubumipos.pdfIn PDF document text
    • http://xeravujowa.epizy.com/eleven_by_sandra_cisneros_literary_devices.pdfIn PDF document text
    • http://bubudisefo.rf.gd/sharp_tv_lc-60le650u_manual.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_off00010921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10921 5352 bytes
SHA-256: a4d889beb2baba332ae5cf71307803b382f8733907d241f1492a85f4434787bc
font_01_sfnt_off00011b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4E 10884 bytes
SHA-256: 0320605dcb6d6dc3f90ea9605dc7c2af255d6b4f53e7e99772c5b732af0d42f2

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