Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7673d90fd1ddcca…

MALICIOUS

PDF

99.7 KB Created: 2021-03-15 13:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3eb8120a118be166a446368d48821fa9 SHA-1: 98d9cbd1275a6d62a621b474e1e95d938cfa482f SHA-256: d7673d90fd1ddcca44420be0a43f99289adbba72ab45f8d0bd5c7c199fe2dfd2
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs points towards an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/wix?keyword=jean-louise+chief+joseph+daughter PDF link annotation
    • http://tofugezupeb.mygamesonline.org/que_significa_titulo_reconstruido.pdfIn PDF document text
    • http://rosipale.scienceontheweb.net/bremsstrahlung_x_ray_production.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/8625307.pdfIn PDF document text
    • http://kovativegapok.getenjoyment.net/pamenukusobes.pdfIn PDF document text
    • https://zifokodogip.weebly.com/uploads/1/3/1/3/131398222/gujezakatepuza_rofakunenogasa_pogiwufi_jijoxapevuwog.pdfIn PDF document text
    • https://zujujogonawanuk.weebly.com/uploads/1/3/4/8/134879196/sadapamagalu.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/best_portable_cd_player_to_use_in_car.pdfIn 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/lososimap/47013850036.pdfIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_8a62f5f649c84a6281c6beeb4aedf335.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/rodevulilakojetew.pdfIn PDF document text
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_fe18a9f74e9e4e50b220b8064834c47c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jozaponi/sat_essay_introduction_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/just_learn_mitcham_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/infective_endocarditis_guidelines_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/birolerimikexatoduto.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/30527247391.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_04709fadbd704a88a41602a914f8eb48.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxunu/zawotepabedogov.pdfIn PDF document text
    • http://riwefub.epizy.com/49560992299.pdfIn PDF document text
    • http://gulesovel.epizy.com/93927843325.pdfIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_872bd3b43d304ffdb568ee8f52331d5f.pdf?index=trueIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_8083dede9e444e05a266c4143850865e.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13847 5396 bytes
SHA-256: 51d7383656ce5df263a26f36c3732b38b9e3be060bfda5aa85cfd820cb08d12f
font_01_sfnt_off00014aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA4 11964 bytes
SHA-256: caec0baf820654bb93c7da804037722278df136b2368dd1f668d0860736ac92a
font_02_sfnt_off000172b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172B5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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