Malicious PDF — malware analysis report

Static analysis result for SHA-256 114b437605885fa0…

MALICIOUS

PDF

92.4 KB Created: 2021-03-26 13:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4f76ce0fa01b841c98820ac8d4094934 SHA-1: ee6cfe9e679cdb05485d4f472decb99ee1c19a6d SHA-256: 114b437605885fa0ed41d5e48ccaa9ba1b331f3dac2fdd78bb301a2f4329b937
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://crophysi.ru/123?utm_term=bet+informal+definition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417426/normal_601bf8fe9bafd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_601cc134b8ba2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444113/normal_5ffd41e5bd18c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_6033204b97aab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457279/normal_60570b221175f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_603c8668cd81d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527357/normal_60062e94391d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385011/normal_6040ae867667a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449014/normal_601b1b3a71484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501634/normal_6024bcd7760c2.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/dojonuta/35933828452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f668228f-9f63-4984-b7f2-e2d80730fcf5/how_to_draw_on_ipad_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca68215-4966-41b8-8119-1b29eb23ce72/magukosilewifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b266c1-8712-425e-b08f-f32d129f4f06/outlander_books_amazon.ca.pdfIn PDF document text
    • http://xoxasosopu.epizy.com/40080299318.pdfIn PDF document text
    • http://wamigorudazuz.epizy.com/28674909603.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/hp_6500_printer.pdfIn PDF document text
    • http://dowegumorugujon.epizy.com/13036627737.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/cashflow_101_game_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ac2432-1a50-4f03-82da-ad8ed698dcff/kenmore_80_series_washer_pump_repair.pdfIn PDF document text
    • http://fepavipa.epizy.com/base_de_datos_en_excel_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e99536b-2d00-423f-98e2-81d0a955d83c/18513638703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d2ff0f1-98e4-4fd4-ab2e-08babca6fc4c/gagatexubogapavaf.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/android_games_free_offline.pdfIn PDF document text
    • http://tewidunutazi.rf.gd/adobe_photoshop_cc_tutorials_video.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/wawejemuguxajasuf.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_off00010255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10255 4712 bytes
SHA-256: 86f68934fbb6c858658dfb1d49a34f92a9ced28ab2331cd12f51dedae6e83f95
font_01_sfnt_off0001122e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122E 13220 bytes
SHA-256: 6c81369af944d71deb82d53070fad7d2a84afd0e0667d384d6043b61954f228a
font_02_sfnt_off00013de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE9 16544 bytes
SHA-256: 1b44218257806f750c7fedc2cca84b6b30ff477c2da870f9e14c0541087d9c9f
font_03_sfnt_off0001542c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1542C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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