Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebd8ee6506d02cb…

MALICIOUS

PDF

79.3 KB Created: 2021-03-01 21:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: db7cd6f147a5ab8f233f42aa8b20218f SHA-1: 5e6567f38d3780ee84331d5e7d6df4912ec51263 SHA-256: 5ebd8ee6506d02cbf1f8b383ad54393ffcef5ac2c1dc21e995ea0346b46d9909
156 Risk Score

Malware Insights

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

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 0.9998

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 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.
  • 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://lozipotod.ru/strik?utm_term=speed+queen+front+load+washer+ff7+reviews PDF link annotation
    • https://cdn.sqhk.co/wokinuge/aF1Hr8f/zodexalikenateromawufo.pdfIn PDF document text
    • https://rawewarox.weebly.com/uploads/1/3/1/3/131379085/nujodusepixo.pdfIn PDF document text
    • https://cdn.sqhk.co/sajixobuko/fSFjaih/69356301654.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/c3hajao/subnautica_reaper_leviathan_concept_art.pdfIn PDF document text
    • https://cdn.sqhk.co/turovonunido/qMidjfk/mumomar.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/lurutopobi/gomeno.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/38711529834.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/how_do_i_unclog_my_insinkerator.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/95756992225.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/mojin.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/10373291864.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/ardhanari_telugu_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/wogibana.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/retal.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/reptile_and_amphibian_merit_badge_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/27666500428.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/khan_academy_functions_quiz_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/heart_attack_blood_clot_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/insinkerator_hot_water_dispenser_leaking.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/backtrack_for_windows_7.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_off0000eb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB90 5472 bytes
SHA-256: 3edc3e2c94db89d13a8ba3af77d7696ac1ed32c72fe64022fe5c076ea736fe46
font_01_sfnt_off0000fe37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE37 10364 bytes
SHA-256: f3e4ed7e236f3cb30e3d66284fc8a9b59c567cb2ef6f75bd47f9171742fdb735
font_02_sfnt_off0001218f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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