Malicious PDF — malware analysis report

Static analysis result for SHA-256 78482d1553d763b8…

MALICIOUS

PDF

82.0 KB Created: 2021-01-23 01:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9f3a29458add9ae394a155d817871adc SHA-1: b62e5a110be9fd4197eb1825f8225a5869215bd7 SHA-256: 78482d1553d763b86ae87920354188cc9d1642d3395f49739eaef5cb4df47e54
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with several pointing to disposable hosting or potentially malicious domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and a link farm heuristic further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=skyrim+old+hroldan+inn+coc PDF link annotation
    • http://torevifij.iblogger.org/declarative_and_interrogative_sentences_worksheets.pdfIn PDF document text
    • https://site-1245332.mozfiles.com/files/1245332/website_documentation_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476268/normal_5fe9de96672c6.pdfIn PDF document text
    • https://penoruzeni.weebly.com/uploads/1/3/4/1/134132400/waneluvibonuxor-befuxoxurubine-savazukaworene.pdfIn PDF document text
    • https://site-1251890.mozfiles.com/files/1251890/aster_aweke_new_song_2019.pdfIn PDF document text
    • https://site-1168247.mozfiles.com/files/1168247/topurite.pdfIn PDF document text
    • https://tuwakunasuj.weebly.com/uploads/1/3/0/8/130874309/6599722.pdfIn PDF document text
    • https://site-1191779.mozfiles.com/files/1191779/survival_police_prison_escape_v3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383160/normal_5fce02ba0cd19.pdfIn PDF document text
    • https://botasapozav.weebly.com/uploads/1/3/1/6/131607984/d58323a9a82f.pdfIn PDF document text
    • https://site-1197012.mozfiles.com/files/1197012/ice_cream_sandwich_cake_recipes_easy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365536/normal_600514700f679.pdfIn PDF document text
    • https://rumevupalod.weebly.com/uploads/1/3/0/7/130739773/badedegapomapavabeno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424013/normal_6001b753f18cb.pdfIn PDF document text
    • https://site-1179350.mozfiles.com/files/1179350/vipomolawu.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/wurivuve/gusion_item_guide.pdfIn PDF document text
    • http://votitagupen.epizy.com/27515917644.pdfIn PDF document text
    • http://besowotu.epizy.com/microsoft_word_label_template_20_per_sheet.pdfIn PDF document text
    • http://sezajebufixi.epizy.com/sufapogabexujir.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B2 4860 bytes
SHA-256: 81f2a1df0569b763e49f7c42b555c4ce80573e6f94513c1cc8f15e8b4849ebea
font_01_sfnt_off000105f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F6 11384 bytes
SHA-256: 196d6736902250042903006b852fc2bd95676bb01bece82077bdf9c70e755a8a
font_02_sfnt_off00012c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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