Malicious PDF — malware analysis report

Static analysis result for SHA-256 6909fa2793b61c29…

MALICIOUS

PDF

94.4 KB Created: 2021-03-16 10:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 11ff78c2414297cf83e1489375152519 SHA-1: eb0579025a3c9f77dbb69291f98206515b7ed97f SHA-256: 6909fa2793b61c29e5ad84c58461c6ade6e6b7f121c7d4c0e8020f0281a310fc
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document explicitly requests sensitive recovery information, such as private keys or backup codes. This, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://jottigo.ru/wix?keyword=lifetime+fitness+north+austin+jobs PDF link annotation
    • https://fewurigog.weebly.com/uploads/1/3/0/9/130969621/7729425.pdfIn PDF document text
    • https://cdn.sqhk.co/wezikinupig/P8Ljc2V/46894482839.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/W2cKOjD/carnivores_ice_age_pc_download.pdfIn PDF document text
    • http://ledimpress.biz/29702433321f0wrk.pdfIn PDF document text
    • http://webmastervlad.ru/transformation_physique_definition_chimieds7qv.pdfIn PDF document text
    • https://cdn.sqhk.co/befulirawid/XeRnjag/kukuf.pdfIn PDF document text
    • http://hugertely.xyz/warojisojevilemepab25h9.pdfIn PDF document text
    • http://sunepoxuvigos.66ghz.com/kunixolopar.pdfIn PDF document text
    • https://kifosaxuwaf.weebly.com/uploads/1/3/4/0/134016965/425878fd8bd.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/heWPUvW/halloween_runescape_2020_rs3.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/5hejgij/games_to_learn_english_for_adults.pdfIn PDF document text
    • https://mirajaxudedina.weebly.com/uploads/1/3/0/7/130775596/wufiwujeme_wuvuvalo.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://uploads.strikinglycdn.com/files/f3c4ebf3-5b40-4163-bade-1669306cc1fc/what_is_an_acknowledgement_of_service_form.pdfIn PDF document text
    • http://magonusu.epizy.com/video_call_via_wifi_android.pdfIn PDF document text
    • http://regipikiwubadov.epizy.com/85689905100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adab2815-0d7b-4888-a032-5e2211dcedbe/food_without_grains_and_sugar.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/frisco_co_weather_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9a2ce6-fecb-4cad-a699-0d21077fc7ea/cateye_bicycle_computer_setting.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/stihl_024_av_super_chainsaw_price.pdfIn PDF document text
    • http://toxisokipefofo.epizy.com/fatadudaxejatalaz.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/kassadin_guide_runes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/601434df-ca11-48dc-8268-3f9f765015a0/55819471748.pdfIn PDF document text
    • http://xelidamos.epizy.com/homonyms_homophones_and_homographs_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/answering_your_partner_s_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/kumpulan_ayat_ruqyah.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D73 5012 bytes
SHA-256: 1e75fff872248209d6c6a24239026d2a749aa5cc825f6aa6013273dca9331d6f
font_01_sfnt_off00011e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E54 12104 bytes
SHA-256: 9d98199ca3f05da35bd32ca3aef3e756b1d832fdd716293d51a8e5cf29e99657
font_02_sfnt_off000146c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C1 16176 bytes
SHA-256: b34bc647a855ee836f1f15d23d07ef8fc86c66da9663e0d441a972b7f835d709
font_03_sfnt_off00015bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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