Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc6e8b8d9739d72…

MALICIOUS

PDF

81.3 KB Created: 2021-02-28 00:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c1a96bb5f0c4ac1211fc6129467dc356 SHA-1: e028e81f5e8192b592865913458d7af7f9017ba6 SHA-256: abc6e8b8d9739d72d69bc3a3679c2514fc62e2d6f5b6a9b1423d3647429fdd3d
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/strik?utm_term=how+to+get+autocad+full+version+for+free PDF link annotation
    • https://cdn.sqhk.co/temisexezoda/phfSxxk/82440755847.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/valuation_sur_les_pronoms_personnels_ce2ttdzl.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/jcjfURm/10524978236.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/ibijhzv/dadojimo.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/vbqgfha/real_driving_ultimate_car_simulator_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/morovujefi/gcRjjhc/65510309686.pdfIn PDF document text
    • https://cdn.sqhk.co/keliziniw/hbic2hc/padivekalufoked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jitemawuvefogox.epizy.com/agathiyar_movie_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/easy_trumpet_sheet_music.pdfIn PDF document text
    • http://pojuzuduxotazup.epizy.com/vegexigavubizubiserojavok.pdfIn PDF document text
    • http://vebodowumiba.epizy.com/simple_biodata_form_free_word.pdfIn PDF document text
    • http://gaxijejazaxedaj.epizy.com/my_bloody_life_audiobook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/59189056082.pdfIn PDF document text
    • http://liwusetokabozil.epizy.com/daisy_powerline_1000_air_rifle_review.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/ielts_essential_guide_british_council_reading_answers.pdfIn PDF document text
    • http://muguvap.epizy.com/simple_permutations_and_combinations_worksheet_answers.pdfIn PDF document text
    • http://tinuzutajalik.epizy.com/85590788208.pdfIn PDF document text
    • http://mogegan.epizy.com/pikagabirunawukosaremodub.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/christmas_carols_guitar_chords.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_off0000ffa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA2 5304 bytes
SHA-256: dd1940d04a4ddf95f3ab85a8d3ded116749455b046d952400695233f01175f0a
font_01_sfnt_off000111db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DB 11100 bytes
SHA-256: 2e78ea6e55059b90c5bac0a99b356e5b1c44613ec3397a52721b0c09586ff660

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