Malicious PDF — malware analysis report

Static analysis result for SHA-256 a406b9a45c9af863…

MALICIOUS

PDF

77.6 KB Created: 2021-03-16 00:38:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 1fc79af484160df771b50cc00a8cf450 SHA-1: bf20f7bb599e3d19dbf105f71cc195ecadbc8b80 SHA-256: a406b9a45c9af863ab046d92048e459902e66f34102c85ce5f0814061a6c303b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing or a trojan. While no scripts were extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 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://golowaki.ru/wix?keyword=protoss+carrier+replica PDF link annotation
    • http://card2card-perevod24.site/rolivewo8i7u1.pdfIn PDF document text
    • http://atomyimperial.ru/bahubali_2_mingku4v4.pdfIn PDF document text
    • http://lifegirls.site/primitive_skateboarding_wallpaperoqx2t.pdfIn PDF document text
    • http://lnstagramverifycentre.com/icd_9_code_for_sepsis_inflammatory_response_syndrome4s1hr.pdfIn PDF document text
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/dupaworituduze.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/pobusu-sosutevenabeki-xetivuze-josase.pdfIn PDF document text
    • http://fesaniru.iblogger.org/rotalapesogeruzu.pdfIn PDF document text
    • http://gaxesujite.medianewsonline.com/dokewunobuxonasibisubop.pdfIn PDF document text
    • https://sadejakudabad.weebly.com/uploads/1/3/5/9/135965210/firobazu_banaz.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/vobuven_likusalumuwe_tusewulujugi.pdfIn PDF document text
    • https://suwudaxodorepe.weebly.com/uploads/1/3/4/8/134885248/3089829.pdfIn PDF document text
    • https://gulapizebulo.weebly.com/uploads/1/3/1/0/131070336/faguforofu-zudipas-suxelagonanok-rigajigid.pdfIn PDF document text
    • https://nabisafuv.weebly.com/uploads/1/3/1/4/131413222/4747302.pdfIn PDF document text
    • http://itwomen.space/questions_are_the_answers_allan_pease_summaryosfki.pdfIn PDF document text
    • https://tajusubinem.weebly.com/uploads/1/3/4/8/134886452/pegum-tizexopoposego-xopopudusunidux.pdfIn PDF document text
    • http://rufoferapavinew.medianewsonline.com/10274561795.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muvabeso.epizy.com/danawukidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b7f70a0-65c0-447c-bbee-609cd011b44e/xukupafagaxalerat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/843b5ece-6501-4d89-8afe-410ddbdb116d/black_and_tan_dachshund_christmas_ornaments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0c2dd8a-e312-4cec-b8da-4e8f5e9adbb0/ropamusatixi.pdfIn PDF document text
    • http://mawekipabotore.epizy.com/hey_you_pikachu_n64.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73357fcd-273d-4249-adc5-558daa381bc4/ratatimagarafis.pdfIn PDF document text
    • http://lojibovel.myartsonline.com/blood_guts_and_glory.pdfIn PDF document text
    • http://joriboka.epizy.com/gawanekujigoxixuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf51167-95a8-4db5-9945-a22dd1047f6c/asus_rog_maximus_vi_hero_drivers.pdfIn PDF document text
    • http://tokumizexafu.epizy.com/2969118544.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_off0000efdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 4928 bytes
SHA-256: 803da556822a4257616f6e86a5f48741308f5913af3cc71381efc01ae7a3395d
font_01_sfnt_off000100b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B0 11944 bytes
SHA-256: f16d949a258a88c42bae9fbb622bea21ec10495d575763a864f29c5be8a2c0e3