Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbadfeb22b50b177…

MALICIOUS

PDF

76.4 KB Created: 2021-03-17 23:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e1824a80703569c70759c1640a667567 SHA-1: 4d7d5e4b7a514b2e68160a23294ac33635bc8c11 SHA-256: dbadfeb22b50b177d53bd3ca76891856982f1508f0763ab73d6183ddee4132d1
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically pointing to 'jumiwimov.ru/award' which is flagged as a malicious link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a compromised or malicious site.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/award?keyword=caries+dental+en+ni%25C3%25B1os+de+2+a+5+a%25C3%25B1os+pdf PDF link annotation
    • https://cdn.sqhk.co/tolononof/gd4iid8/gwent_android_external_storage_full.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/jdje7re/41748862946.pdfIn PDF document text
    • http://pufuwobexoz.iblogger.org/kanijagolasuzumixavarobuj.pdfIn PDF document text
    • https://muzafudopabebex.weebly.com/uploads/1/3/4/8/134865208/f66ed4832.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/he9gf4d/can_you_stream_fox_news_live_on_firestick.pdfIn PDF document text
    • https://bowefolezoz.weebly.com/uploads/1/3/1/4/131407704/tagibiguzexidor.pdfIn PDF document text
    • https://budovatepita.weebly.com/uploads/1/3/1/3/131398204/9150033.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/7061483.pdfIn PDF document text
    • https://cdn.sqhk.co/subetudagoli/gdNghe5/mega_photo_pro_apk_tanpa_bayar.pdfIn PDF document text
    • https://revistaodontopediatria.org/index.php/alop/article/view/4ContinuarIn 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/d636fa50-02f4-417e-998a-437e2c6b57dd/jitterbug_flip_phone_best_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/cydia_app_ios_13.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/effb2e5f-ab17-430e-bdd0-1af8437de867/kafuzigufifidalobowapen.pdfIn PDF document text
    • http://wawaxujogoned.rf.gd/avg_internet_security_2019_key_free.pdfIn PDF document text
    • http://topazipimobol.epizy.com/44202014963.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/madazonomitupuvo.pdfIn PDF document text
    • http://xipipowateselok.epizy.com/dozezizifu.pdfIn PDF document text
    • http://pebupudugaxax.epizy.com/xopepesowusugi.pdfIn PDF document text
    • http://zevofelajasuz.epizy.com/az-_300_exam_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/lizurevotusig.pdfIn PDF document text
    • http://funizenobuwuka.epizy.com/wedurubazaj.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_off0000e953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE953 5408 bytes
SHA-256: 003b53f1aa136537aa0176c13f32b0eee21d19d25f708d568bbe1ef1bae8d3fb
font_01_sfnt_off0000fb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB81 11796 bytes
SHA-256: 7b0b4976406c82012b6fb50ff344985b46a30323235ff64cb01cebe3d63a9da1

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