Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df76dc46ff92826…

MALICIOUS

PDF

76.9 KB Created: 2021-03-03 05:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1b65b2cffcfb0860b9789b3ffbfaf9a6 SHA-1: 268fbd05b6612cf45a4f774e769bf314b411d69b SHA-256: 7df76dc46ff92826c4c350753133b3d93e8d5a2e7343f636f7a888f16a5f1a64
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to drive traffic or distribute malware. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or a downloader. No scripts were extracted, but the PDF structure and numerous external URLs point to a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=how+to+become+a+guardian+ad+litem+in+florida PDF link annotation
    • https://lewozokor.weebly.com/uploads/1/3/5/4/135400983/jizijorile_kukinejenolosi_varozakusu.pdfIn PDF document text
    • http://misstourist.info/15988064369hlt0a.pdfIn PDF document text
    • http://gatorama.space/test_de_codependencia4b3nx.pdfIn PDF document text
    • https://nawodovifuvobix.weebly.com/uploads/1/3/0/9/130969758/baxuzaladijisu_novofexi.pdfIn PDF document text
    • https://cdn.sqhk.co/kosibowo/iiU49o9/detention_pond_vs_retention_pond.pdfIn PDF document text
    • https://felojabok.weebly.com/uploads/1/3/0/7/130739263/bc916631cfde.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/kufuviwowe.pdfIn PDF document text
    • http://dom-bita.org/real_book_6th_edition_bass_clef4q3k7.pdfIn PDF document text
    • https://mapivabivex.weebly.com/uploads/1/3/0/7/130776319/vojetabitirufov.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/21423fde.pdfIn PDF document text
    • https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/waxamawedano.pdfIn PDF document text
    • http://leftoutclub.com/tosesikucv3.pdfIn PDF document text
    • http://womans30planet.com/mudunubekodekopuxovavi9yvk.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/Tihhhjf/munirexunumubudewi.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/bQbqhig/learning_android_application_development.pdfIn PDF document text
    • https://vijizonumek.weebly.com/uploads/1/3/6/0/136034009/didifikomiromulepuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/agcigcU/58753257341.pdfIn PDF document text
    • https://judetali.weebly.com/uploads/1/3/4/7/134723341/judunugekuzomuvu.pdfIn PDF document text
    • http://leaninrzpd.site/14113508283nhsy6.pdfIn PDF document text
    • http://nesobaka3.xyz/708493313684rl6t.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/qEgeqay/black_magic_wallpapers_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 5356 bytes
SHA-256: 6d530d065ef620eca60e5def8bae48d54cacf77737c7e1d83034d449cd7a5a7f
font_01_sfnt_off000100f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F3 10868 bytes
SHA-256: 631ca3889097bb67159da2c839de1748436e4b981c40bc298502f1d9ba1e52d2

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