Malicious PDF — malware analysis report

Static analysis result for SHA-256 24efe1c8023759a5…

MALICIOUS

PDF

77.8 KB Created: 2021-03-29 22:34:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: da9fc63c8f4ac0c0ca9b477856d4e6be SHA-1: 48b2a99cac02c5392f5e50a4ab7b020b28bf715f SHA-256: 24efe1c8023759a57fa9fb02f679b67a3adf32705a555299a947cb117981f887
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with at least one pointing to a domain associated with link farming and potentially phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'status bei whatsapp löschen android', suggesting a lure to trick users into visiting the malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/123?utm_term=status+bei+whatsapp+l%25C3%25B6schen+android PDF link annotation
    • https://cdn.sqhk.co/waxobakal/hhhdbhe/42072811894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382962/normal_60387c3386771.pdfIn PDF document text
    • http://sujatafuluwariv.22web.org/airline_industry_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383170/normal_5ff25d6755a83.pdfIn PDF document text
    • https://cdn.sqhk.co/biwizalibe/aRMqlij/jawazotekixipavogokuxepo.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/jmmRzif/jubekovulubumafulux.pdfIn PDF document text
    • http://vedovipog.22web.org/15174375952.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/ljilhaU/90s_music_streaming_radio_free.pdfIn PDF document text
    • https://cdn.sqhk.co/folikulezig/fgdgeQ9/mewumav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384036/normal_604fd771a2026.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366032/normal_5fe06d53b2fa1.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/ib1gdjj/donde_cruza_el_tropico_de_cancer_en_mexico.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/gejugorixokavoxa.pdfIn PDF document text
    • http://tirevotijo.epizy.com/new_blu_ray_releases_2018.pdfIn PDF document text
    • http://gunagiweraji.rf.gd/47881791270.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/suxelewibazazodulabajupav.pdfIn PDF document text
    • http://kezitiw.epizy.com/76617194000.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/video_recorder_application.pdfIn PDF document text
    • http://pebivinetovawu.epizy.com/bemosalulizasepuzafa.pdfIn PDF document text
    • http://nepafel.epizy.com/what_is_the_highest_the_stock_market.pdfIn PDF document text
    • http://namidonom.epizy.com/bradford_council_report_missed_bin_collection.pdfIn PDF document text
    • http://mowelafawugek.epizy.com/56416533370.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/96511625968.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_off0000ee87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE87 5632 bytes
SHA-256: 1bf2b3198fbf96d0d101a8335db3773d319980f5df8d1456dee9eb9b491c7e0a
font_01_sfnt_off0001016e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016E 11600 bytes
SHA-256: aba61803a0a488898ac9b74bb841e8c87d23cd111475aa3f8f7c71a514335c8a

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