Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1054a668e5e6ceb…

MALICIOUS

PDF

138.7 KB Created: 2021-05-06 05:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 29ebd8da5484eeb70c4c37ab905b08a5 SHA-1: 128e440b0b2b110ee2e52ad135bbbd6bd3e99d71 SHA-256: b1054a668e5e6cebb56cf89d7f05e7e5055a2999239d9a3e76f76653acaede35
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary URLs, 'https://ponafet.ru/strik?utm_term=journey+to+the+west+1996+khmer+dubbed', is likely part of a phishing or malware distribution scheme. The ClamAV detection and ML classifier flagging further support its malicious nature, indicating it's a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9505

Heuristics 6

  • 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.
  • 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/strik?utm_term=journey+to+the+west+1996+khmer+dubbed PDF link annotation
    • https://cdn.sqhk.co/rexadiwixox/hfrhcjh/bmat_assumed_knowledge_guide_2019.pdfIn PDF document text
    • http://mivifukatovaga.getenjoyment.net/28210661632.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/gQhilgf/views_of_substance_use_disorder_patient_records.pdfIn PDF document text
    • https://cdn.sqhk.co/kurinunuwor/cjjgggc/73901585455.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/h61gcjh/14802073742.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/ibShhhb/cross_phone_wallpaper_download_gif.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/71448048064.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/3geiijb/lerodaz.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/hgiejhV/environmental_studies_major_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/ejjtYih/37058647499.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/LgdhRfe/lazisarozufibuv.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/Quhbib6/wadizixigogotilum.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/aqWhtcs/1099259422.pdfIn PDF document text
    • http://fumuroruzej.medianewsonline.com/fizazeromadibolo.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/lXa18gf/sad_adrienette_fanfiction.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/UAhdpjc/ark_basic_survival_guide.pdfIn PDF document text
    • http://kudusakepupa.sportsontheweb.net/4_10_by_10_coordinate_grid_paper_in.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/iYmiejc/97216772862.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://s3.amazonaws.com/fedufiporara/add_worksheet_in_excel_vb._net.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/belanger_vector_car_wash_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/gaxiradebukubeboremutuf.pdfIn PDF document text
    • http://lofunadex.myartsonline.com/capital_budgeting_and_estimating_cash_flows.pdfIn PDF document text
    • https://183df7f2-4185-4ca0-bfcc-33b39bc842f1.filesusr.com/ugd/9ac34a_42cbc45df220466d8d3e1e89611579d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutisigila/swimming_goggle_lenses_color_guide.pdfIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_e2e0652dc998405581131bbadf6e1cdd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/football_manager_handheld_2012_psp_cheats.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
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010e2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10E2B 51316 bytes
SHA-256: 64e255abf7c3d08b8a0f93062abe71f411a9a9bfe15891572c90664f3a90a207
font_01_sfnt_off0001a85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A85F 5408 bytes
SHA-256: 4fc849e924a1ebd7e08d76cdde807320801258c0b8a65812d004f4a75ceb2122
font_02_sfnt_off0001ba95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA95 7248 bytes
SHA-256: 817f1d6186650fe05d69a948aba403acdcd5bc0f9d5195a7b7738fd7179f73ee
font_03_sfnt_off0001d007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D007 12256 bytes
SHA-256: f4d3f9bfb04d0a86375a863460a8c48330737ff4050d73c2185a250d31aff5c6
font_04_sfnt_off0001f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F85A 16076 bytes
SHA-256: ebf689d51ed3b58778ccf7ee11078071a21d17262a377a1c882137165fc51b0d
font_05_sfnt_off00020cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20CF3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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