Malicious PDF — malware analysis report

Static analysis result for SHA-256 6742d790be99ad72…

MALICIOUS

PDF

80.7 KB Created: 2021-04-01 23:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e8f83d3ada0b3c21a280190a6b745e36 SHA-1: 505fe1649b4058223c55f35a1c0f3d31c9fcdf53 SHA-256: 6742d790be99ad72cfc162765e9d07890141d72023a816e38a6eab446f1b9488
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

Heuristics 5

  • 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 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/award?keyword=jurnal+skripsi+akuntansi+keuangan+pdf PDF link annotation
    • http://potavivas.22web.org/kivoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_603f22245f214.pdfIn PDF document text
    • http://vitetiw.getenjoyment.net/multiplying_dividing_exponents_worksheet.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/kugijovevojopujalet.pdfIn PDF document text
    • http://harkateine.fun/29026250217rw7xv.pdfIn PDF document text
    • http://mukofatisi.iblogger.org/after_chapitre_1_vf.pdfIn PDF document text
    • http://vashobereg.com/kokotajumititafsdqm2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421352/normal_5fed9c92ea842.pdfIn PDF document text
    • http://nigma24invest.online/3698823065s7d4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410459/normal_6030d41284328.pdfIn PDF document text
    • http://insurancesouk.com/39366306567i9yaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456379/normal_6065568a50075.pdfIn PDF document text
    • http://vojidovalo.iblogger.org/php_form_validation_submit_button.pdfIn PDF document text
    • http://sfr-webmail.com/8916089327uupws.pdfIn PDF document text
    • http://uablog.website/rikugudigadupozazalarekambs70.pdfIn PDF document text
    • http://wexypay.icu/571650527443qe7f.pdfIn PDF document text
    • http://eagleaff.com/tactics_for_listening_third_edition_free_downloadgrcri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420917/normal_5fffbd373b1cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gugawojakopa.rf.gd/28501049433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1387d713-fe02-4fda-bc69-481e27657a6e/what_is_meant_by_noting_of_bill_of_exchange.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec2940e4-bd32-46a5-a445-80fdcd5cf549/civil_engineering_fe_exam_prep_book.pdfIn PDF document text
    • http://diguneleg.rf.gd/ziredoxotajavu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC79 5260 bytes
SHA-256: dbcae7944568889097d89abc7c8c63fc2efcf38e3e63dc3d324c08fc0ef11705
font_01_sfnt_off00010e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E71 11036 bytes
SHA-256: bf2abfa90d95be9a2e77c1ec0c97c1dbdba18401220e822baac2830d657bd070

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