Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7bae8810fa137d…

MALICIOUS

PDF

78.0 KB Created: 2021-03-03 06:00:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ba2352f1e0cf5a35800a9c8d6ba77fc6 SHA-1: 5c9e39708c010a01acdc55a90f444646f8a9f6f0 SHA-256: 4a7bae8810fa137d0f980450c130386df40c5845e35049b1d69f16d40692cb42
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://botokaw.ru/strik?utm_term=what+4+types+of+organisms+have+a+cell+wall PDF link annotation
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/15cb131c80d7.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/HnVgfhh/offline_gps_locator.pdfIn PDF document text
    • https://bojepelesu.weebly.com/uploads/1/3/5/3/135350442/ea0b0dd7.pdfIn PDF document text
    • http://fexuvukenix.22web.org/vosoxitevaluwexu.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/fnhfYhi/little_panda_farm_story_mod_apk_android_1.pdfIn PDF document text
    • https://butadagawonor.weebly.com/uploads/1/3/1/0/131070306/f6b29b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_60386472ed54b.pdfIn PDF document text
    • https://lujisitezolip.weebly.com/uploads/1/3/4/1/134109273/gijixizibukizegejonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_5fe6884a0f9ee.pdfIn PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/9089165.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kovusipeduza.epizy.com/android_push_notification_example_in_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/xudim.pdfIn PDF document text
    • http://xovimed.rf.gd/ultimate_ninja_blazing_mod_apk_japan.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/lebajifimubedodomosimase.pdfIn PDF document text
    • http://jijazofar.rf.gd/pupako.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_off0000f23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23E 5784 bytes
SHA-256: e1d40cb93ca72b7eadf24607bd49cb938b2689d1506a92d150a7c4616b4dfe9f
font_01_sfnt_off000105fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FD 10848 bytes
SHA-256: 0d498531b63d188ebc3b924db8dd4e4359ca52aa30364b54a6afd04596426139

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