Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3bbac77bf8c1b14…

MALICIOUS

PDF

78.0 KB Created: 2021-03-10 08:28:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 966466f17d2507f04d9b0d068c7081da SHA-1: cfbc213d7aced5a848020999190aba83c5054635 SHA-256: d3bbac77bf8c1b1481e171279bae83b7d066d5ffb75af53f68bd55ebab8e45fb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://mezovuduw.ru/strik?utm_term=ergo+360+back+carry+hiking PDF link annotation
    • http://cetly.xyz/bdo_failstack_calculatorf45va.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/at_dev_english_to_bengali_dictionary_free_download.pdfIn PDF document text
    • http://totaxusozavu.sportsontheweb.net/david_wilcock_the_ascension_mysteries.pdfIn PDF document text
    • http://hurleyshamburgers.com/download_gta_san_andreas_apk_data_200mbg44pe.pdfIn PDF document text
    • http://sagunutu.medianewsonline.com/trx_strap_workout_video.pdfIn PDF document text
    • https://cdn.sqhk.co/lamikolo/fBigdlO/mega_iptv_live_iptv_channels_guide_apk.pdfIn PDF document text
    • http://1pokypki.website/work_abroad_guide6zcom.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/lwU1jbp/36525597084.pdfIn PDF document text
    • https://cdn.sqhk.co/pilozarager/broAZsc/20264087345.pdfIn PDF document text
    • http://risurevisawibe.iblogger.org/original_cast_of_girlfriends_guide_to_divorce.pdfIn PDF document text
    • http://meweremidef.iblogger.org/federal_arrest_warrant_form.pdfIn PDF document text
    • http://ruxakemo.22web.org/platformio_vscode_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/xuteposidobi/d2Cjdji/21781077545.pdfIn PDF document text
    • http://topsol.xyz/how_can_i_make_my_micro_sim_into_a_nano_sim4ecr2.pdfIn PDF document text
    • http://helpcopyright-service.com/basic_english_grammar_free_download_in_hindiu3qmj.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/91386023930.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/yheIMuX/formation_aide_familiale_promotion_sociale.pdfIn PDF document text
    • http://parovosi.mygamesonline.org/the_millers_prologue_and_tale_translation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baroputufusu.rf.gd/88857135342.pdfIn PDF document text
    • http://taroveruwidiba.onlinewebshop.net/85520637039.pdfIn PDF document text
    • http://lokunegop.epizy.com/39009462408.pdfIn PDF document text
    • http://kololujes.rf.gd/maloxitimeg.pdfIn PDF document text
    • http://tadezaxe.rf.gd/tubakogixuji.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/what_is_the_best_ccrn_review_book.pdfIn PDF document text
    • http://durudafakeluva.epizy.com/matlab_grader_solutions.pdfIn PDF document text
    • http://danebusuji.onlinewebshop.net/tavosemivikar.pdfIn PDF document text
    • http://fopuzotetowux.rf.gd/mojijoxim.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_off0000f303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF303 5572 bytes
SHA-256: b5f086d094d00e738fd07a3477314b68abefdbcbe029d87a1f207714f891e81b
font_01_sfnt_off00010603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10603 10580 bytes
SHA-256: 0d36a774dc90703b6bfaea1925d1e1e4b6e6214dcb98b3c9da617bdf3d2a8515

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