Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3a78d703860e3d…

MALICIOUS

PDF

79.7 KB Created: 2021-05-20 04:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a5d0a0e0ac511f79ca8b3c8e8937b11e SHA-1: 9d1012adecd7c23b51f4060132c07daabe57ac5b SHA-256: 9c3a78d703860e3d382ea9b7b7177a482f1ebb51946909edb16514f0d92e6eed
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, suggesting a link farm or distribution mechanism. The document body, though heavily obfuscated, appears to be a lure related to narrative genre classification, which is used to direct users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=clasificacion+del+genero+narrativo+concepto+y+ejemplos PDF link annotation
    • https://famepakemujo.weebly.com/uploads/1/3/2/7/132740594/tabozuwasuder_gulizijitotuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_60298d35d9045.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380876/normal_5ff7fd64a0c9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_603bdd0599e68.pdfIn PDF document text
    • https://nefosedinipal.weebly.com/uploads/1/3/4/6/134698739/209efb.pdfIn PDF document text
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/bd157e8.pdfIn PDF document text
    • https://gegixigozazewit.weebly.com/uploads/1/3/4/8/134858275/rutovududufab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414847/normal_5fe453d9f38f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6bd33b-7a81-48ec-93d1-7f1d12a57056/penevizuk.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/30372262383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36b3e64b-eb26-4295-a6f8-adb5cfab86c6/cuales_criterios_orientan_la_educacion_en_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/asme_section_viii_division_1_2007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a79c1a2f-7485-4f9e-b53a-2f4364d27d7a/rarolemukezesuxuro.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/plate_clutch_friction_experiment_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/58126910767.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/fekepitupusesugajup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/898c219a-9b60-469c-b47f-15d6b82ca1aa/pesepamararibosedijesusop.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/crook_catcher_pro_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/pofam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3791d06-24ac-40eb-9365-e36bc620dda4/juzavigazewalusezixup.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/10602242120.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_off0000f817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF817 5620 bytes
SHA-256: 676aeb743082e44aaba847c81e5535303838c18f16e11194ca3abba975868eb8
font_01_sfnt_off00010b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 11152 bytes
SHA-256: 9fc1a17a6190bdc9050b32fd9c614680de07bfcec062c4d7bd7feb9189d6afa1

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