Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e21a5c984a91519…

MALICIOUS

PDF

74.5 KB Created: 2021-03-04 04:42:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9856606af036dbe9e3c1c6e39f5760a5 SHA-1: f9c944a6bf0f4d0c811745e3c74a00eff1c25f3c SHA-256: 4e21a5c984a9151906dd3ade441948b4f026a23dba141bf921b0fee8f4dcb561
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains numerous external links, indicating a link farm or phishing attempt. The PDF structure and embedded links suggest it's designed to redirect users to potentially harmful websites. No scripts were extracted, but the presence of external URIs is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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=sparrows+nest+athens+ga+hours PDF link annotation
    • https://doxavigefixo.weebly.com/uploads/1/3/5/3/135391607/7881662.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/ar_10_lower_blueprint.pdfIn PDF document text
    • https://cdn.sqhk.co/wojidumezu/giigbha/mini_radio_am_fm_sony.pdfIn PDF document text
    • http://xojudesabesone.66ghz.com/zobedazotumosapupavumisuf.pdfIn PDF document text
    • http://vk-settings-change.online/como_agua_para_chocolate_analisis_por_capituloshph7a.pdfIn PDF document text
    • http://gratoraama.website/scosche_loc2sl_yellow_wire61yz5.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/huskee_lt4200_belt_adjustment.pdfIn PDF document text
    • http://pedrons.space/58815878639nps98.pdfIn PDF document text
    • https://dataremidesop.weebly.com/uploads/1/3/4/6/134697992/9922604.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/words_that_start_with_a_to_describe_a_feeling_of_happiness.pdfIn PDF document text
    • http://bio-ita.fun/vefera5sd8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/toderorusugokijunu.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/26083512274.pdfIn PDF document text
    • http://konazosite.epizy.com/38644021621.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/how_do_i_set_up_my_fishing_pole.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/how_to_put_together_the_shark_navigator_lift_away.pdfIn PDF document text
    • http://dudakitulefuteg.rf.gd/lekagekoxawodixowunis.pdfIn PDF document text
    • http://papipafikumi.epizy.com/tumumotibeb.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/palaxiporedutezegeja.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/google_ads_search_certification_test_answers.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_off0000e71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71C 5244 bytes
SHA-256: 36ea27306261c9c7cee169c6e258298092d3f79ce053d8e560ebb19e99068d43
font_01_sfnt_off0000f8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FE 10704 bytes
SHA-256: 07c55bd348dd227ca6ce0c6a7e7bb6a30d3dacd920a2de3c6e32c8d4707c4a3e

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