Malicious PDF — malware analysis report

Static analysis result for SHA-256 da19fd82a093f41c…

MALICIOUS

PDF

72.9 KB Created: 2021-02-13 01:04:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9fe4ef8252b0d69104ab39043e58047e SHA-1: 5c7f18d06723702c6c7846e4fb3d015536e0b93e SHA-256: da19fd82a093f41cf9e8e6c611c323888fee6cb3185a02a2912f53c806ac3082
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 0.9998

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 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://jacksth.ru/123?utm_term=weil+hall+uf+map PDF link annotation
    • https://cdn.sqhk.co/dajusonas/jihgEc2/bus_simulator_2015.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/5Pahbib/fm_radio_transmitter_app_for_android.pdfIn PDF document text
    • https://lezexoxutipeb.weebly.com/uploads/1/3/4/4/134462335/gumon.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/Albjiic/prism_live_studio_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/9UQwZWB/liwumerizelafagemevuno.pdfIn PDF document text
    • http://tanitebose.22web.org/11067080790.pdfIn PDF document text
    • https://pojadobaga.weebly.com/uploads/1/3/4/8/134853930/012f4f8.pdfIn PDF document text
    • https://cdn.sqhk.co/kalijada/hfLhjpz/order_contacts_online_with_unitedhealthcare_insurance.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/iiyefje/free_download_notepad_for_windows_7_64_bit.pdfIn PDF document text
    • https://gidupewurugi.weebly.com/uploads/1/3/1/6/131637306/f49609691.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/ravuxudibure/85030147233.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/9718719788.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/weekly_meal_planner_template_excel.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/school_days_game_english.pdfIn PDF document text
    • http://noxudovo.rf.gd/sweet_box_images_free.pdfIn PDF document text
    • http://jizuwugi.rf.gd/15064361596.pdfIn PDF document text
    • http://vodukatova.epizy.com/84063143615.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF01 4468 bytes
SHA-256: 888dc6c8ae1bc5b8d632fd099326b5a213790f017a4469392da906f64b566c62
font_01_sfnt_off0000de36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE36 12388 bytes
SHA-256: 0cac6df014bfc825733b64ee340b4b719710a5c7ea0079395e5260c4bdffe072
font_02_sfnt_off000106a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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