Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b19cfe462932ce…

MALICIOUS

PDF

80.9 KB Created: 2021-05-24 11:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7de151dc7f6e6bdb39b1fa70bf0eb070 SHA-1: 7eae71b93b0b3372a6eaffc0daa895e60ee945cc SHA-256: 77b19cfe462932ce7b50a389668e13ed906f024cf2f34732653957486dda0d81
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for credentials. The document body, though partially corrupted, suggests a religious theme used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=a+que+edad+se+puede+bautizar+segun+la+biblia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387718/normal_6016e2f513d29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490542/normal_5fe5c71e2beaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488133/normal_601bfcc91819f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403534/normal_5fd79a942acba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_6049305c64556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470401/normal_601bddd6a13f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453885/normal_606a1d1fd32b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374535/normal_5fdec50f8fac8.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/mijumomub/divaxirudepuje.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/reflexive_pronoun_worksheet_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/43159389519.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/mabasilogete.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/bursitis_hip_stretches.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/worksheets_of_countable_and_uncountable_nouns.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/canvas_business_model_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/what_is_paige_bueckers_net_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/tuwugemefalewumufo.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/56484671152.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/45596082925.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/dogodulen.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/12981655059.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/heath_zenith_motion_sensor_light_manual.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_off0000fa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 5432 bytes
SHA-256: 6602430e09917cfd0b93f656d5959190fb4238faca39917ea7dd15974369c016
font_01_sfnt_off00010cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFB 12072 bytes
SHA-256: 0df09a8bd9060b67ebdf132265dd8b0e404c451e81413ae886a8ec165bb9643b

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