Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2704e1a6e4d1983…

MALICIOUS

PDF

84.5 KB Created: 2021-03-06 19:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5d1a8148ef9138c4b3d0cab40ea52df5 SHA-1: a6f114fbb6b0ab61d5d89a496c7c6c33171f104b SHA-256: d2704e1a6e4d1983cf6cec88a356019ad002972d568cc5cde9d5e05e582145e9
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains or link farms, indicating a likely SEO spam or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity, potentially involving JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dugedepap.ru/123?utm_term=english+grammar+tenses+pdf+free+download+in+urdu PDF link annotation
    • https://cdn.sqhk.co/vakolitakap/hidaa8B/kaiser_urgent_care_san_diego_vandever.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5fdf335abc178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_602414319c63f.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvatagukas/ds3Y5b6/microsoft_authenticator_app_android_backup.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/OegcEXl/tagekunukidefekozavapaxo.pdfIn PDF document text
    • http://helpcopyright-service.com/29020726161j1rwg.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/fibiiid/centurylink_email_support_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/subesanodag/heojbge/delemozedufadisuruponar.pdfIn PDF document text
    • http://twoup-viktoria.online/360083297803q38m.pdfIn PDF document text
    • http://vbruti.site/fast_and_furious_turbo_charged_watch_online0pu6b.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/hbvbpgi/84344366736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_603d0e3848ef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_603506b728704.pdfIn PDF document text
    • http://arevakar-travel.com/nunaxomezozowoso3161z.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/6HigJ5e/aluminum_steam_table_pans_half_size.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/aggTidG/piwoledepowija.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475730/normal_5fef6fb0b4c04.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/visagogijulep/ms_publisher_2019_calendar_template.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_26e054f2832c41579955e58d992cd41a.pdf?index=trueIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_4f78a46bc4984e42935584c406042a58.pdf?index=trueIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_63bdd70dcf0149db991247031ce9e478.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/34481684830.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/a_plus_certification_study_guide_free.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_7939c26ea0c8437897972d8b75560aa5.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_off0000ff8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8F 5388 bytes
SHA-256: c4a4236d335588714f552d10906df54018625b958cc02c7358b7f38b89b2e697
font_01_sfnt_off000111c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C1 10520 bytes
SHA-256: 3bf1cffdf356c26ef26d82c428bb8f49d008b3994cc2e55f5cc1c4bdf28dc9c1
font_02_sfnt_off000135a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A1 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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