Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef7ccd5b05132b34…

MALICIOUS

PDF

81.6 KB Created: 2021-05-08 14:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 669add6fd2406ded23e78a73b1e51a53 SHA-1: f685dfc10d1aeebd18caf31b82c09f875d2c1e15 SHA-256: ef7ccd5b05132b34678a40e89cf86a244dcd8cf0a7e597d085c9d4bf776be8a5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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=kenmore+elite+he3+washer+error+codes+fh PDF link annotation
    • https://cdn.sqhk.co/kufalavoxig/hPQLgfS/diners_club_del_ecuador_telefonos.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/hbJuGBB/kilidezosojasewi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470405/normal_60048c01f1d5f.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/Iibgit2/nalazajedonuluvawuvusona.pdfIn PDF document text
    • https://cdn.sqhk.co/muruwake/cifcieZ/que_es_memoria_iconica_en_psicologia.pdfIn PDF document text
    • https://cdn.sqhk.co/lipetebo/3jahhge/lateximet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503617/normal_600eb7bb2b88d.pdfIn PDF document text
    • https://cdn.sqhk.co/xisigokomu/jHYoihA/relufadokisonutumen.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/6Mnjjij/20722049782.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/W4cGK7Y/27357964243.pdfIn PDF document text
    • http://puxajilesodaxob.22web.org/guide_translation_in_spanish.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501963/normal_6039b446dd422.pdfIn PDF document text
    • http://judifino.iblogger.org/what_color_should_the_lights_be_on_my_arris_modem.pdfIn PDF document text
    • http://kavopiluxum.iblogger.org/calligraphy_bible_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470391/normal_5fffc6fc2d540.pdfIn PDF document text
    • https://cdn.sqhk.co/nopavoboriru/ihSuhar/jobuwepogivezidamoxufi.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/DjgCSjb/rorajivituwoledujudude.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/jasoda_sarkar_all_baul_song.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/hhhihgM/bagazodenoveretu.pdfIn PDF document text
    • https://cdn.sqhk.co/gutejalajige/5AN0ja8/adversaries_definition_synonym.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gupupofof.rf.gd/tamil_astrology_software_free_with_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/crowley_lake_ca_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/ram_cichlid_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/zmodo_camera_wont_connect_to_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/call_of_duty_zombies_android_hack.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_off000101c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C8 5484 bytes
SHA-256: ef4a8bd6aa2a116639c117f5eabe23027d72edd9b763f4e59e96e1e3aae17546
font_01_sfnt_off00011458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11458 10900 bytes
SHA-256: 91aeaf37eceb74b1512bc56268d28e5920a64811e656930878e83cbabc7b1381

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