Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b79deaf9b1df01f…

MALICIOUS

PDF

76.2 KB Created: 2021-04-17 21:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ff24d64c2040f84e4414bf428d02f2cb SHA-1: ef251b83150819f83f2d09e06aff2703f5263f16 SHA-256: 0b79deaf9b1df01f0101137805ccce2ff1311c6cfccdf66d03a4de7cc0b4047e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a 'PDF_SEO_LINK_FARM', indicating a likely attempt to direct users to malicious sites. The primary malicious URL identified is 'https://pelibifir.ru/strik?utm_term=fantastic+mr+fox+characters+kylie'. The ML classifier and ClamAV detection strongly suggest malicious intent, consistent with phishing or malware distribution.

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://pelibifir.ru/strik?utm_term=fantastic+mr+fox+characters+kylie PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377704/normal_5fefdd9a85620.pdfIn PDF document text
    • http://lafilubepojev.scienceontheweb.net/87193129043.pdfIn PDF document text
    • http://lixidepobejoji.mypressonline.com/vezixarej.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/cassation_decision_volume_20.pdfIn PDF document text
    • https://poxotedodesogin.weebly.com/uploads/1/3/4/3/134305686/8786280e242a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476750/normal_5fd5fac261994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458412/normal_601487d7a2d43.pdfIn PDF document text
    • https://nimukebobe.weebly.com/uploads/1/3/4/5/134527887/a7c14c.pdfIn PDF document text
    • https://lasarowolu.weebly.com/uploads/1/3/6/0/136024073/lalifumodiniv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482413/normal_60331a682b2eb.pdfIn PDF document text
    • https://xesinuvukuwufo.weebly.com/uploads/1/3/0/7/130776104/gerupijutisidomu.pdfIn PDF document text
    • https://xoberaditide.weebly.com/uploads/1/3/4/6/134645794/9017198.pdfIn PDF document text
    • https://vomerigovelaj.weebly.com/uploads/1/3/4/9/134901888/kosogax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411935/normal_5fd95880c538d.pdfIn PDF document text
    • https://vudolizozirotor.weebly.com/uploads/1/3/2/8/132815306/8684445.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/befafuni/audio_technica_lp60_usb_black_review.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/reddy_heater_30_000_btu_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/whats_the_difference_between_dyson_v11_torque_and_animal.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/afarinesh._org_reading_test_6_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/turumemobili.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_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 5308 bytes
SHA-256: c719ca12c2bddf647cebb2c003a42d6c230bde550df8807a2b32392d418e2bc0
font_01_sfnt_off0000ffda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDA 10428 bytes
SHA-256: 9972089baed837a0f498ce599d7fb53fbb91ab48e3fcfb33645424d076ddd1f4

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