Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0b20343b4eedd3…

MALICIOUS

PDF

136.2 KB Created: 2021-03-17 08:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1336ba756e6f21c38c10045c1eb8d3a6 SHA-1: 2d9f953a421e590b12c546176ce19bf8794c7d7e SHA-256: cb0b20343b4eedd35098907a87904d86ee97e1188213a8ec9cf718ef13f3737d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://dafemum.ru/123?utm_term=aosp+extended++mido PDF link annotation
    • http://modebedunizux.iblogger.org/canada_visitor_visa_application_form_egypt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460071/normal_60314e650fe56.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/wodogasolomemige.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/modernist_cuisine_deutsch_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370777/normal_6006127111418.pdfIn PDF document text
    • http://pifumufupes.iblogger.org/fudigebuxegolexabukupetiv.pdfIn PDF document text
    • http://wigogaduxatinuv.iblogger.org/aptitude_test_question_papers_with_answers.pdfIn PDF document text
    • http://jinobuzid.scienceontheweb.net/ttc_psychology_textbook_malayalam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488103/normal_6035a90dcc4db.pdfIn PDF document text
    • https://banepopewux.weebly.com/uploads/1/3/4/2/134234854/5ec75c8d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_60299b694de2f.pdfIn PDF document text
    • https://vemusosafuz.weebly.com/uploads/1/3/1/3/131398108/164a3b8de1.pdfIn PDF document text
    • http://fivadoguna.medianewsonline.com/80_meter_delta_loop_antenna_design.pdfIn PDF document text
    • http://gemajesubon.22web.org/does_taco_bell_still_have_the_breakfast_crunchwrap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_f377bc3c2f2d41bf993f5c87271cb883.pdf?index=trueIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_61bf78b858c24ee1b55d175e55d6ca77.pdf?index=trueIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_42da77085d2d46bc86f7c79c45939f0d.pdf?index=trueIn PDF document text
    • http://lidudoxodirabi.rf.gd/mumibesubijowoxa.pdfIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_19ba20e0fa854f9f9b46e1efa6885771.pdf?index=trueIn PDF document text
    • http://kenuzuwemonuda.epizy.com/land_reform_in_the_philippines_slideshare.pdfIn PDF document text
    • http://dudulexo.epizy.com/9909825585.pdfIn PDF document text
    • http://jimanujomubil.epizy.com/lufovetobufowebibedanedid.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_a7cf15f6f3a5485cbe2581430216ef89.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D8DC 4824 bytes
SHA-256: 1154083ec93cdc7c146c4b7371cd2b45d1720553c00f9b032d2a467ab471a136
font_01_sfnt_off0001e939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E939 12240 bytes
SHA-256: cbab7bffb2e5b43b646fa08949cd4cbbda119735b2444dba795d84eb166f830f

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