Malicious PDF — malware analysis report

Static analysis result for SHA-256 839ba5c9e2fae1fb…

MALICIOUS

PDF

77.6 KB Created: 2021-03-27 20:37:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ca232a42a8b48615a69da4be3c3fd7aa SHA-1: d6c2fc28a65f05bba589bb211c7c932af7381869 SHA-256: 839ba5c9e2fae1fbae0b9bb165e6910701feab97bed1431292ba1fb8ffef6bd3
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely intended to redirect users to malicious content.

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 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://druttle.ru/strik?utm_term=what+day+does+the+mandalorian+come+out+each+week PDF link annotation
    • https://sebinegovana.weebly.com/uploads/1/3/4/0/134095930/pitoxejipudexonos.pdfIn PDF document text
    • http://vatiwoditape.iblogger.org/zerisevimin.pdfIn PDF document text
    • https://dipejabixeg.weebly.com/uploads/1/3/4/7/134716175/vugagu-vekewigodusif-kipipikuzufe.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/41177132205.pdfIn PDF document text
    • http://prequester.online/how_to_put_oster_hair_clippers_back_together7oj5j.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/71574198843.pdfIn PDF document text
    • http://cethq.xyz/what_is_unique_about_sydney_australia_area_codevtmc1.pdfIn PDF document text
    • https://zidifupo.weebly.com/uploads/1/3/4/4/134475425/pulitis-jogegaz.pdfIn PDF document text
    • https://nojezedefefowas.weebly.com/uploads/1/3/4/7/134762002/3183a736be957.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/stock_investing_for_2020.pdfIn PDF document text
    • https://telidububiz.weebly.com/uploads/1/3/1/4/131452987/relifebase-pevedobekox-zokarogejefita-kadulabu.pdfIn PDF document text
    • http://rukozhop-guide.com/sf-_12_scaleylaa1.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/b5e52690-6abb-4acc-9fd3-f577c294f2c6/bujoxaralavukexe.pdfIn PDF document text
    • http://jawuwibunoropo.atwebpages.com/centralized_and_decentralized_management.pdfIn PDF document text
    • http://nixomirorubu.myartsonline.com/the_myth_of_sisyphus_full_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1642ae9e-c807-48b4-9b81-bb71d6459162/23_minutes_in_hell_review.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/robudamixilidoxazonuj.pdfIn PDF document text
    • http://sisuvoxodukon.epizy.com/vovamojakakigum.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/agudas_llanas_y_esdrjulas_juegos.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/4031968507.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/jewellery_website_templates_wordpress.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_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 5448 bytes
SHA-256: e261213c7d0007254950a926905df69d65f0262ca896ebdfd37e2d2b53dc24a7
font_01_sfnt_off00010454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10454 10852 bytes
SHA-256: c2cf9f01add69f2d57b8cc997f09c052ca079ea3f6b2321d43181e3287c48ca4

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