Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59b82602fab2c17…

MALICIOUS

PDF

73.6 KB Created: 2021-03-06 04:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 65b5792354371ccb8737b4ecdfc78698 SHA-1: 5db3c6f2789966ced5bda8f14a2a126849261a6f SHA-256: e59b82602fab2c17e16d1bf02aedc67bd3475e99c615fb099f841da4df1451fa
186 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 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dugedepap.ru/123?utm_term=computer+software+definition+and+examples PDF link annotation
    • https://cdn.sqhk.co/xaranoraf/jgfixRm/hmrc_self_assessment_investigation.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/7518154.pdfIn PDF document text
    • https://cdn.sqhk.co/xipugonor/DLhcZhi/crossfire_car_audio_c5-_1600d.pdfIn PDF document text
    • https://zokuxupan.weebly.com/uploads/1/3/1/4/131412362/dubeludi.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/nhiaShh/om_nom_run_mod_apk_download.pdfIn PDF document text
    • http://detonic-buy.website/sezosijunusenulaa6h8r.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/Jjbgihd/steamboat_springs_colorado.pdfIn PDF document text
    • https://zobatovegu.weebly.com/uploads/1/3/0/8/130873738/fusezov-ligolu-davipugor-vevan.pdfIn PDF document text
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/welatedusu.pdfIn PDF document text
    • http://meetporte.xyz/denuvevazumadilekeredamexuwo3f.pdfIn PDF document text
    • http://bobr.space/95783552910atgta.pdfIn PDF document text
    • https://cdn.sqhk.co/papebikuwi/jjcjh92/4x_strategy_games_switch.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://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_f14ac46f45054fe58da20e41329b41eb.pdf?index=trueIn PDF document text
    • https://f0ddeb88-3549-4a27-8821-6e3dd713f165.filesusr.com/ugd/2b74da_4c2ea12fc6324c8f966710cac2af8a3d.pdf?index=trueIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_6028d1664d2b4bf0b58a54a44ce21a75.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/tosonazawazesuvejuzev.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/what_is_stephen_hawkings_disease.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_5d7ef845d72a41b58bf08c3020767e9d.pdf?index=trueIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_142fc050032641c7875a07891d6657a1.pdf?index=trueIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_6856bd1871a146a9a6b01e8991984ee2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jotizifime/belgium_embassy_abu_dhabi_visa_application_form.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_4c6880c0b3334cf1a5a594d4702d91fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/old_firefox_for_android.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_off0000d6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D7 5252 bytes
SHA-256: 8d4ce79c54fd2203c891d8bd35b2ec230eaba45abdd9b550bc7bd58c4d82f47a
font_01_sfnt_off0000e8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AE 9840 bytes
SHA-256: 471e9bfed170a6fbe440148ec5c4113f2603fff2d28b5a208213794f7061ca75
font_02_sfnt_off00010a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A49 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e