Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02bb7ce396a3040…

MALICIOUS

PDF

75.5 KB Created: 2021-04-26 04:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 27642e3639977d5bcfee423d6176843b SHA-1: 2ebcc1bd15e5978095c6a7b4eb9c082d09de2a23 SHA-256: b02bb7ce396a3040d90dd86865d0b9280c3c6fc638502a410729112d15119eb1
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link and a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded links are designed to redirect users to potentially harmful external sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/strik?utm_term=brother+2270dw+toner+replacement In PDF document text
    • https://fizinizaboz.weebly.com/uploads/1/3/5/3/135304720/9201861.pdfIn PDF document text
    • https://jewaxesototipa.weebly.com/uploads/1/3/5/3/135326518/2773892.pdfIn PDF document text
    • https://verigidiloje.weebly.com/uploads/1/3/0/8/130874422/0472e4e2c26.pdfIn PDF document text
    • http://dibosezufo.getenjoyment.net/93474817038.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/oZkjgmR/tirazamolegujuxuvijitoguz.pdfIn PDF document text
    • https://cdn.sqhk.co/mivesavif/cV7sjeC/wikipedia_english_dictionary_free_download.pdfIn PDF document text
    • http://neditaxuvim.getenjoyment.net/antenna_diversity_in_mobile_communications.pdfIn PDF document text
    • https://nujirami.weebly.com/uploads/1/3/1/3/131384028/4499173.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/iL61xFY/wordscapes_level_8583.pdfIn PDF document text
    • https://pujapuvefebawu.weebly.com/uploads/1/3/4/5/134581836/maxenipusoxipugefek.pdfIn PDF document text
    • https://lumamiwaba.weebly.com/uploads/1/3/4/7/134735329/dexugijevesisi.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/jbgcTge/how_can_i_get_my_etisalat_bill_online.pdfIn PDF document text
    • https://xunimolozabipos.weebly.com/uploads/1/3/2/6/132681728/guxupojij.pdfIn PDF document text
    • https://vovinusowoxojik.weebly.com/uploads/1/3/4/3/134349833/8bfb79e1185e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gopifu/60706160317.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/how_to_calculate_the_moles_of_each_element_in_a_compound.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/rijowadadar.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/10119602225.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/carrabba_s_catering.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/69774123318.pdfIn PDF document text
    • http://bidusibebawuz.onlinewebshop.net/how_to_play_cards_against_humanity_green_box_rules.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_off0000e6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CE 5632 bytes
SHA-256: d95253d13ac4537c0e40c4bf647fd24468551f5ebf1228538ea61ecd7a310a9c
font_01_sfnt_off0000f9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E2 11468 bytes
SHA-256: d85862a6a79c969891faba99d30416fcd8cc1ad169211dd0e83ab5dad9033b96

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