Malicious PDF — malware analysis report

Static analysis result for SHA-256 770956076d961fba…

MALICIOUS

PDF

90.2 KB Created: 2021-02-28 20:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f345ddf6db6fbee91fdd96e213934fca SHA-1: 5cd6b2d5893a2fb28a0c066997802785ba92ef10 SHA-256: 770956076d961fba3c7e4aa363dba605f4561ff2e644b2b18a1b9ccf2f10ad1c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that likely serves as a lure to a malicious site, disguised as a film review. No scripts were extracted, but the presence of external URIs and the phishing classification strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=a+woman+in+berlin+film+review PDF link annotation
    • http://kozovuxe.22web.org/planes_y_programas_2011_primaria_segundo_grado.pdfIn PDF document text
    • http://kostlike.site/landmarks_in_humanities_4th_editionvsi9i.pdfIn PDF document text
    • http://winoorama.space/lajojengtdl6.pdfIn PDF document text
    • http://phulop.store/xavupomubqgp3d.pdfIn PDF document text
    • http://wamepiguvoj.iblogger.org/43333894293.pdfIn PDF document text
    • http://j3vnci4.xyz/throne_of_glass_audiobook_downloadobt2x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530070/normal_5fd7b8314a3dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414153/normal_5fe8fc412e7a8.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pasawe/2806021806.pdfIn PDF document text
    • http://ponodorivodub.rf.gd/sozomigu.pdfIn PDF document text
    • http://vovivufevalo.rf.gd/39174367598.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/famorodatu.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/word_answer_in_sentence.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/nekilojizazokini.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/duwimuguragazetavigot.pdfIn PDF document text
    • http://farilofisimoru.rf.gd/xulekimasiged.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/maneparoxisew.pdfIn PDF document text
    • http://vetozidute.rf.gd/msc_business_information_technology_napier.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010da4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10DA4 9516 bytes
SHA-256: 90ed71235851471d6f8b934a7630dccd6d3dd6087163eb9d7f97d71b9d582bfb
font_00_sfnt_off0000fdbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBC 4724 bytes
SHA-256: e07f42f564f0ef0ff2aa2f151730be240682b4152cf83f350a9e75101f72c785
font_02_sfnt_off0001288a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288A 10872 bytes
SHA-256: a79379340427bf5a5b742f2f13ef217b4afcafe1c1d3d287b5c47562dd9862a1
font_03_sfnt_off00014ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CCD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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