Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e34e3c7b6e44343…

MALICIOUS

PDF

84.6 KB Created: 2021-03-11 03:23:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ea392c2d1be9893890ca518d53c7d8ab SHA-1: d7e6462288ee8febedd74122c0a7c8b32ff0ed37 SHA-256: 5e34e3c7b6e4434388c6c6e1be42ff3d2377cc171804090008c6a524c58725b1
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 0.9990

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://baarspo.ru/strik?utm_term=best+oil+for+champion+inverter+generator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464532/normal_6026e8f49f347.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/can_you_split_face_cards_in_blackjack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451549/normal_5fd7a1172e426.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470040/normal_5ff8496c7b862.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/fuparolat.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/6461660930.pdfIn PDF document text
    • http://fesumebujurasa.22web.org/wildgame_innovations_cloak_8_lightsout.pdfIn PDF document text
    • http://gewututikame.getenjoyment.net/oral_hypoglycemic_drugs_classification.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388815/normal_5ff5a3c2ea6fa.pdfIn PDF document text
    • http://pupofikavize.iblogger.org/how_to_reset_a_samsung_fridge_filter.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/diary_of_a_wimpy_kid_film_2012.pdfIn PDF document text
    • http://xojuxegalixiluj.66ghz.com/albbox_tv_sport_apk.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/netters_anatomy_flash_cards_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486765/normal_603f26fb6ecbe.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
    • http://jaweratiz.atwebpages.com/libros_de_apologetica_cristiana_gratis.pdfIn PDF document text
    • http://kitilogokufalu.atwebpages.com/how_to_get_a_blooper_links_awakening.pdfIn PDF document text
    • http://tupaguwojisese.rf.gd/joker_board_game_template.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/advanced_engineering_mathematics_9th_edition_erwin_kreyszig.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/momiwuwojupifuwone.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/scratch_programming_tutorials_for_beginners.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/34560236015.pdfIn PDF document text
    • http://fasilew.epizy.com/data_science_intern_chicago.pdfIn PDF document text
    • http://gonidiwofove.epizy.com/free_simple_will_template_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/dd_3.5_anti-mage_build.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/49207018729.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_off0000fe53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE53 5324 bytes
SHA-256: 14404e0954902f0da202389620fafcce42321e8c9b172b10b64d267e264d858d
font_01_sfnt_off0001104f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104F 11228 bytes
SHA-256: 0e4b7b3a4de8db53c4e2131eac61aab01ff8cb4fdac03e6bbd508fe9a9ba0bba
font_02_sfnt_off000136b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3