Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1af72b825130b2…

MALICIOUS

PDF

86.9 KB Created: 2021-03-05 09:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ee2e9d4a535271165a9d8509510dcf7f SHA-1: de0d3f65e03dd606f9db085c91a975314cda437c SHA-256: 7b1af72b825130b2fff13b923b9ad26ffdecede4d6f0efd962d3cec56ea7751f
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The presence of a 'download' button lure further supports a malicious intent to redirect users. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/wb?keyword=how%20to%20use%20garmin%20oregon%20750 PDF link annotation
    • https://foralesu.weebly.com/uploads/1/3/4/0/134096101/libemawozutibarexil.pdfIn PDF document text
    • https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/vopagegibixuz_gilovewop.pdfIn PDF document text
    • http://organic-ita.space/hum_jaise_ji_rahe_hai_koi_ji_ke_to_bataye_song_downloadn6n2j.pdfIn PDF document text
    • http://yblda.fun/guru_granth_sahib_meaningmb9ht.pdfIn PDF document text
    • https://ledapenilodaro.weebly.com/uploads/1/3/1/0/131070651/7858299.pdfIn PDF document text
    • http://italy-small.space/63364004284w1fct.pdfIn PDF document text
    • http://duromexixupa.iblogger.org/citrix_cloudbridge_datasheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_6028efffcc065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_6032da123c460.pdfIn PDF document text
    • https://jugifipunud.weebly.com/uploads/1/3/1/4/131437595/miluli_muwuwadoluz_sigikigo.pdfIn PDF document text
    • https://telogedibosujo.weebly.com/uploads/1/3/1/4/131438044/16417355.pdfIn PDF document text
    • http://biomanix.best/msi_b350m_mortar_arctic_review541qz.pdfIn PDF document text
    • http://xojokare.iblogger.org/cloudy_with_achance_of_meatballs_cast_cop.pdfIn PDF document text
    • https://mexavabawidusa.weebly.com/uploads/1/3/4/3/134375000/sedubigenuzagi.pdfIn PDF document text
    • http://agentsoft.space/jasper_reports_xls_generation_java_exampletipev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451348/normal_60351427944c5.pdfIn PDF document text
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/jafurojuwiduj_jegixijado_fadagebebifi_xosejiwuso.pdfIn PDF document text
    • https://lodikesilir.weebly.com/uploads/1/3/4/8/134868057/mujoxuwipon_bupuvafenetik_wedavux.pdfIn PDF document text
    • http://golivexi.22web.org/hutchison_telecommunications_annual_report_2017.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://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_7c0ece6a88fc44dd858843c4c707a54d.pdf?index=trueIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_007c10582517476baf0881f841562935.pdf?index=trueIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_7b2f867f1c40431da921be13d92e1795.pdf?index=trueIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_3d8e4fa3bb12457b9514c16bfaaa48b6.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CE 5256 bytes
SHA-256: b93486b44dc103396a20e333d1054435697524d96010a40a7da30fb3d161d9f1
font_01_sfnt_off000118b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B3 11824 bytes
SHA-256: 056048dcefee5796e94dfdbcc804b9a3af8f2c1f5e39787c1c16fcf0c08bddf6
font_02_sfnt_off00014042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14042 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e