Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dadc4cc31f1fd55…

MALICIOUS

PDF

77.0 KB Created: 2021-03-24 12:16:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 96d46a193bc0a54c782e93e9a973da23 SHA-1: 53885f9ad96a8335829f9b3fd04ead6f917633d6 SHA-256: 1dadc4cc31f1fd557b43994cb1d5eb1d3d6e25ce7197ccdf69e5b51c0c8c1a06
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://yafferge.ru/award?keyword=banking+awareness+book+by+arihant+pdf In PDF document text
    • http://pidawudimo.scienceontheweb.net/productos_notables_binomios_conjugados.pdfIn PDF document text
    • http://nezesepibakow.iblogger.org/66363565791.pdfIn PDF document text
    • http://jakiduve.scienceontheweb.net/l_adjectif_numral_cardinal_et_ordinal.pdfIn PDF document text
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/dakidevuwosaf-jenugin.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/commonly_abused_drugs_chart.pdfIn PDF document text
    • https://kokazokurazafan.weebly.com/uploads/1/3/5/3/135348127/5830381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373505/normal_6033d13c4ff01.pdfIn PDF document text
    • http://besemafobekilir.22web.org/police_report_houston.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_605a2c8f0637e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465703/normal_603961c543901.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bagugexasorip.myartsonline.com/12535133443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d2b1ff-cf21-43fd-a44f-d04090a8ca23/dell_poweredge_2900_ram_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e683bd7d-d600-4a15-b74a-3a3f0e2a225a/chick_fil_a_calories_fries.pdfIn PDF document text
    • http://pariwexeral.epizy.com/2075873874.pdfIn PDF document text
    • http://zaruxokogidut.epizy.com/49885316640.pdfIn PDF document text
    • http://xojakejib.epizy.com/guggenheim_partners_investment_management_llc_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee69d8f2-880a-4aae-8b5f-ea93c11d5a8b/maler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d0739f-c9ed-4a5a-88bf-28fa1bb35da0/the_rockpile_by_james_baldwin_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/826855b8-fd90-4751-adcc-a41c571f9dc1/how_to_reload_a_diaper_genie.pdfIn PDF document text
    • http://muvotezazalad.epizy.com/lemanowu.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_off0000eba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA4 5720 bytes
SHA-256: 41b5ef13a4f81e3f0b8f48ca370931572f18107c2cd9a3ccce758230493a86cf
font_01_sfnt_off0000ff33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF33 11124 bytes
SHA-256: 6f5e39b58e4116ee803464e3d8cfe81ddc54871b828cbfe88b39c81a325971cf

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