Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9e7878f35bede7…

MALICIOUS

PDF

82.8 KB Created: 2021-02-25 12:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 89239271896b6c106011a0011e00ae72 SHA-1: 9e57b10ffe93d37829eeb470e8a6bd0be3480f92 SHA-256: 5a9e7878f35bede7309987b4d84d5cd07d78c2f9c14dba86de976bd916d50ecb
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest a phishing or redirection attack, likely aiming to deliver a second-stage payload or lead users to fraudulent content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/aws?utm_term=introduction+to+information+systems+3rd+edition+wallace+pdf+free In PDF document text
    • http://eeeeeyyy.space/pride_victory_10_scooter_service_man6xb15.pdfIn PDF document text
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/sorewawafoso_jifoxulejek_jivesofimogibif_kemubaguzer.pdfIn PDF document text
    • https://likufuzojelawaf.weebly.com/uploads/1/3/5/2/135298946/d7c7879fc.pdfIn PDF document text
    • https://fiziwiminika.weebly.com/uploads/1/3/4/6/134686918/f50916c2bfa4ab.pdfIn PDF document text
    • https://sorolaxubamabu.weebly.com/uploads/1/3/0/7/130739744/rovowuwisisitetulana.pdfIn PDF document text
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/batejogabujupavop.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/lijubu.pdfIn PDF document text
    • https://sekatuxu.weebly.com/uploads/1/3/4/8/134894727/raxagibo.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/dogevazapiwediw/how_to_calculate_manufacturing_cycle_efficiency.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/24609113486.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/letter_of_recommendation_for_nursing_student_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/avery_6_tab_divider_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/52682526513.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/2017_coatings_world_top_companies_report.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/74501193754.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/teoria_psicosocial.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/colorado_snow_weather_report.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_off0000f7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 5476 bytes
SHA-256: f6b68ef5f59251bb7ec991b613f17f8f8dc66f68082ff2b724bbc77e56f47b7c
font_01_sfnt_off00010a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A62 10732 bytes
SHA-256: 1dfe08a677e908b2cb029e9cd0ac8dabeba42888f8ed855143272622f7618e36
font_02_sfnt_off00012f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F16 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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