Malicious PDF — malware analysis report

Static analysis result for SHA-256 124820650340e2cd…

MALICIOUS

PDF

74.5 KB Created: 2021-05-07 09:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b950d7f90e4eef516c384db7e21da76f SHA-1: e71d451bc1fed3e5173b479c2730e6e985d12bd4 SHA-256: 124820650340e2cd548f3fdf62f01157c9678c795a57b42a99ae7ecd36f0a3a0
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 0.9998

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 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/strik?utm_term=michigan+medicaid+insurance+providers PDF link annotation
    • http://pemarozelim.iblogger.org/staples_shredder_maintenance.pdfIn PDF document text
    • http://lufafemazivug.iblogger.org/ejercicios_resueltos_alcanos_alquenos_y_alquinos.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/47629503045.pdfIn PDF document text
    • http://guronid.mygamesonline.org/vavuz.pdfIn PDF document text
    • http://tazibesemelegi.iblogger.org/xomolujejozolepapiwebumax.pdfIn PDF document text
    • http://zarepawofeli.22web.org/penicillin_g_davis_drug_guide.pdfIn PDF document text
    • http://befigter.xyz/dinudasunelerebojeninuwaesx.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/34268647064.pdfIn PDF document text
    • http://tertov.xyz/nagupiburalpku.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/singer_touch_and_sew_746299lyx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f3df63-db9f-4381-b002-e4167ba00b63/taurus_pt111_g2c_fiber_optic_sights.pdfIn PDF document text
    • http://puburibiv.rf.gd/noguku.pdfIn PDF document text
    • http://demosegepare.rf.gd/79523096540.pdfIn PDF document text
    • http://vexifebama.rf.gd/abolition_of_slave_trade_in_west_africa.pdfIn PDF document text
    • http://rurasikawasup.epizy.com/machine_learning_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/6676379900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1aa17ab-f348-4e93-97ef-5e0d942a5fe1/93703473939.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/algorithms_unlocked_review.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_off0000e451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE451 5520 bytes
SHA-256: 5227bf1ee9212275ce50d331343d02c448f45e577e5ee37f49d3096c6c280868
font_01_sfnt_off0000f6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 11108 bytes
SHA-256: c9139eb5cec250a874b87bfc88e92bb2fe43e7b5a283db6ac5ac2d664fa9979a