Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9c49363fb3d647…

MALICIOUS

PDF

86.8 KB Created: 2021-03-11 03:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03577360e8c96318dab361dd7dc7b3f6 SHA-1: 8e3ed72c3283a6040c335158ac1290f3ec770004 SHA-256: 1b9c49363fb3d64732f4678b1b84c027ab02026998157168002a18e580bbadbe
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF document is classified as malicious and contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The 'SE_REMOTE_SUPPORT_LURE' heuristic indicates the document likely instructs the user to install or connect to a remote support tool, a common tactic for social engineering. While no scripts were explicitly extracted, the PDF structure and extensive link farm point towards an attempt to trick users into visiting malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://ponafet.ru/123?utm_term=casio+alarm+chronograph+watch+manual PDF link annotation
    • https://zikazofikadit.weebly.com/uploads/1/3/0/7/130739129/sesanojoko-tagawadeburabor-gafovuragap-folaj.pdfIn PDF document text
    • https://mubuzetuwifo.weebly.com/uploads/1/3/4/7/134703000/5119590.pdfIn PDF document text
    • https://semototip.weebly.com/uploads/1/3/5/3/135386148/9391902.pdfIn PDF document text
    • http://zozezobakuk.iblogger.org/bekhayali_me_video_song.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/qu_es_el_cianuro_en_qumica.pdfIn PDF document text
    • https://pudibapajupi.weebly.com/uploads/1/3/3/9/133986481/saxuk.pdfIn PDF document text
    • https://gezameluloxeg.weebly.com/uploads/1/3/5/3/135393377/7750416.pdfIn PDF document text
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/vupifibigagax.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/dadujepofi.pdfIn PDF document text
    • http://nunobuzipame.medianewsonline.com/where_to_get_my_volkswagen_serviced.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/4691585637.pdfIn PDF document text
    • http://xufotegebiv.22web.org/puzzle_games_apk4fun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugerubuvugox.myartsonline.com/the_culture_code_rapaille_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/honda_es6500_generator_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/ameritron_al-80a_schematic.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/chappie_canned_dog_food_feeding_guide.pdfIn PDF document text
    • http://telusomabufa.onlinewebshop.net/what_are_the_words_to_the_book_goodnight_moon.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/how_to_repair_windows_10_corrupted_system_files.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/dd_3.5_e_character_sheet_fillable.pdfIn PDF document text
    • http://ruzoguniwu.epizy.com/outlook_html_email_template_builder.pdfIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/the_art_of_self_mastery.pdfIn PDF document text
    • http://kefitorexere.rf.gd/43911715106.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF9 11820 bytes
SHA-256: 43105e25def0ea38bfb89cc494ab10ad842b8102f8af35eebe4c8798ad76a988
font_01_sfnt_off00011573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11573 5344 bytes
SHA-256: 2b4ff46fcfce599949fd224937d95058d7dc23719073258b1fc3319ce0d76925
font_02_sfnt_off00012782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12782 11380 bytes
SHA-256: b0c451d8eb3add0231d28495231926b93667797f11bb5cafed2d856730fd2a2a

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