Malicious PDF — malware analysis report

Static analysis result for SHA-256 58279892ce7a7e8b…

MALICIOUS

PDF

76.3 KB Created: 2021-03-03 06:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ad51b0a2801fd177c3dc538f6818064b SHA-1: 48f480a0abf65ee63b765e244d97396a15cd4106 SHA-256: 58279892ce7a7e8b7cc4fe7e8c060a4e011374aa798f41127037046618506f7f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a large number of external links, with a critical heuristic identifying a PDF link farm. One of the primary external URIs, 'https://xajibur.ru/strik?utm_term=what+happened+to+kristal+up+and+vanished', is likely part of a phishing or SEO manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=what+happened+to+kristal+up+and+vanished PDF link annotation
    • http://supsun-aero.com/betano_app_androiddqdim.pdfIn PDF document text
    • http://mnatural.space/labyrinthitis_definition_englishoy8o4.pdfIn PDF document text
    • http://zolekumosex.iblogger.org/free_printable_ag_word_family_worksheets.pdfIn PDF document text
    • http://jewlgems.com/avril_lavigne_hello_kittygoc8w.pdfIn PDF document text
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/cb3b7d83fe56ba7.pdfIn PDF document text
    • http://nemekarasika.iblogger.org/sujatijogan.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafaveju/fgcuSDU/dead_zombie_frontier_war_survival_3d_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425217/normal_6003557042ce4.pdfIn PDF document text
    • http://nozipomak.iblogger.org/78357658768.pdfIn PDF document text
    • http://wiregabjuk.fun/mozitenemixu3rha5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasemejatafa.rf.gd/lijozejotadaxeb.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/capitulo_1b_vocabulary_flashcards_sheet_2.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/reaper_of_souls_infernal_machine_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/masirodavobutopu.pdfIn PDF document text
    • http://logaraba.rf.gd/zuzejemube.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/how_to_connect_a_directv_remote_to_the_cable_box.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF38 5184 bytes
SHA-256: 29101615c628fdb53acc16b92b1828d4a475b2a572a824c8bb1ae0f62b6e75e2
font_01_sfnt_off000100e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E4 10268 bytes
SHA-256: f5d1304ba8c98f7a69bcdfd3c8b0a277fa6f977731bd0c49b63d45b056eb72bd

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