Malicious PDF — malware analysis report

Static analysis result for SHA-256 692b42dcfb9dfb8d…

MALICIOUS

PDF

86.6 KB Created: 2021-03-03 09:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: be06aecdd6c6ae4c95b8d46cfd682b22 SHA-1: de529afb02e23f98b72c8e1e2fd0838602c3218d SHA-256: 692b42dcfb9dfb8d862e0887e9681e3202f861751517204fd9c0787f47905fa8
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 0.9996

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://bologen.ru/123?utm_term=how+to+bind+flysky+fs-gt2 PDF link annotation
    • http://ewwe.space/244272753qrq4k.pdfIn PDF document text
    • http://zusapusixivab.22web.org/windows_server_2012_r2_activation_key_generator.pdfIn PDF document text
    • http://pepujolajerikur.66ghz.com/new_adivasi_dj_song_2019.pdfIn PDF document text
    • https://xilamexazoleguj.weebly.com/uploads/1/3/2/6/132695560/9075297.pdfIn PDF document text
    • https://dolevepi.weebly.com/uploads/1/3/4/5/134587457/kemigutiluximana.pdfIn PDF document text
    • http://zuvels.xyz/what_does_hidden_truth_mean_to_this_great_manf62ah.pdfIn PDF document text
    • http://sallles.ru/louis_dreyfus_holding_bv_annual_report_2017woolz.pdfIn PDF document text
    • https://ziloxewimufe.weebly.com/uploads/1/3/0/8/130813797/1e074.pdfIn PDF document text
    • http://mini-cam1.club/financial_market_and_institutions_pdwu04i.pdfIn PDF document text
    • https://wamibujobaju.weebly.com/uploads/1/3/4/7/134716207/8766378.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://semeruxola.epizy.com/formwork_carpenter_camp_jobs_canada.pdfIn PDF document text
    • http://jisosovogumi.rf.gd/bisubewo.pdfIn PDF document text
    • http://kupavojos.epizy.com/work_time_tracker_spreadsheet.pdfIn PDF document text
    • http://risuduk.epizy.com/puviboferedo.pdfIn PDF document text
    • http://rojinunapubepax.epizy.com/zepepinuwerul.pdfIn PDF document text
    • http://wimifus.rf.gd/cisco_anyconnect_windows_7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/kitasaluxi.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_off0000ee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE35 3092 bytes
SHA-256: c977212daf6ace64daccb5edd5b5e60a4dcfeff65078d1469df66379986371b8
font_01_sfnt_off0000f946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF946 5292 bytes
SHA-256: 0f6c2b4e69a2f660a74ed821d6c9d4028d60006d6213b73f1a98da6f2b9b74dd
font_02_sfnt_off00010b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B84 12768 bytes
SHA-256: a5e28be901d7fb536eb4846026bc37899789228349beaf62e672d5dd4751542c
font_03_sfnt_off00013549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13549 16644 bytes
SHA-256: b9efbcd7983a764c16c7f32098479447d906762adb54076e83c250afd50c8b9d