Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d3ea7c5f546e70…

MALICIOUS

PDF

70.7 KB Created: 2021-02-16 20:38:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: da034d1e30a643f20b31f43745287c9f SHA-1: 8d08d2656ea7774e5d0cd0e277ea34b029085c63 SHA-256: 98d3ea7c5f546e702a9916ec3889e0432ef001d2dbde3a0358be831bffae8752
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a high number of external URIs, many of which point to disposable hosting or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://seumenha.ru/wix?keyword=one+tribe+festival+malpas PDF link annotation
    • http://speak4pro.com/nolejolimeveroxosaxag37ce.pdfIn PDF document text
    • http://homeolimp.com/cbrn_trainingrrtio.pdfIn PDF document text
    • https://dexusejigisi.weebly.com/uploads/1/3/0/7/130739233/ratilibedilemonupuxu.pdfIn PDF document text
    • http://trellos.fun/examen_de_manejo_en_new_jersey_gratilz7xw.pdfIn PDF document text
    • http://nibelv.xyz/sheet_music_writing_program_online59ye6.pdfIn PDF document text
    • http://allerlo.xyz/wujejavetinosuriwiguassmp.pdfIn PDF document text
    • http://davofaso.22web.org/mx_goggle_lens_color_guide.pdfIn PDF document text
    • http://excschool.ru/46607983165jidpz.pdfIn PDF document text
    • https://koreperuk.weebly.com/uploads/1/3/2/6/132680900/kamijidevifa-tirajagurapa.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/02523ec45f606.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/Uje8cWv/werebaxajola.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://femodizabofowu.epizy.com/nefukadagevabapenulobar.pdfIn PDF document text
    • http://kidereludabiron.epizy.com/choose_the_correct_form_of_verb.pdfIn PDF document text
    • http://pujusojup.epizy.com/cambridge_primary_review_2009.pdfIn PDF document text
    • http://tokejavopif.rf.gd/44634987273.pdfIn PDF document text
    • http://rajixubododafu.epizy.com/guide_for_llc_starting_business_in_california.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_off0000d87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87D 5272 bytes
SHA-256: 1c113a0716e5a5e3a1a82a07466310b3c0c0c9809e5f602461436dd8c6198eae
font_01_sfnt_off0000ea55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA55 10628 bytes
SHA-256: 7117aa8680a030161d3328af0b4a82ae6b41dfc5c3dd4c8c3e12565dcd972bce

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