Malicious PDF — malware analysis report

Static analysis result for SHA-256 9586bd1350460f0f…

MALICIOUS

PDF

82.6 KB Created: 2021-03-27 10:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e874e7c9dfee6b3239649bf5e70436d3 SHA-1: 2544b19879b90ce0ab36921505b58a1704e83b5a SHA-256: 9586bd1350460f0ff67f28f5e31b15854252e54f726e05563589c494d9dbd824
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate content but lead to potentially malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure, and another flagged a link farm pattern. The ML classifier strongly indicated maliciousness, and ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://yafferge.ru/award?keyword=the+marriage+of+heaven+and+hell+summary+pdf In PDF document text
    • http://chelobaka.space/autocad_software_free_download_2019b5jao.pdfIn PDF document text
    • http://muxadar.22web.org/73212646083.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/ihaq7hb/wuwodiroxuwodigazegom.pdfIn PDF document text
    • http://fukoxonezadanom.22web.org/inquiries_credit_report_remove.pdfIn PDF document text
    • https://paporese.weebly.com/uploads/1/3/1/0/131071113/3239466.pdfIn PDF document text
    • https://cdn.sqhk.co/zadexona/e6jWby0/jolteon_moveset_gen_4.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/hegpjh4/nickelodeon_time_capsule_california.pdfIn PDF document text
    • https://cdn.sqhk.co/fajaleniwa/fChhias/police_scanner_apps_that_actually_work.pdfIn PDF document text
    • http://study-english-04.space/4735291183151p9j.pdfIn PDF document text
    • https://guzarimu.weebly.com/uploads/1/3/4/6/134608133/mizapopekexav.pdfIn PDF document text
    • https://dunofedipusafo.weebly.com/uploads/1/3/4/4/134477286/5243a.pdfIn PDF document text
    • http://bitipusefotas.66ghz.com/mapol.pdfIn PDF document text
    • https://cdn.sqhk.co/suwuwewazaka/isVgeU5/download_game_crazy_free_kick_football_pc.pdfIn PDF document text
    • https://bibevugu.weebly.com/uploads/1/3/1/4/131406802/a1722.pdfIn PDF document text
    • http://50off.pro/land_rover_freelander_workshop_manua8jcg7.pdfIn PDF document text
    • http://noriwisisun.iblogger.org/sawibukedemebiwekuvijujun.pdfIn PDF document text
    • https://bokobuduvi.weebly.com/uploads/1/3/5/3/135347682/aae4b4.pdfIn PDF document text
    • http://pitushok.fun/nanetimiwepule2rth.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/sugowubuf/hollywood_action_movies_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/64155089065.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/lefojemugiwaf.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/caribbean_airlines_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/ziwekijaboxatutefobagi.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/gardens_of_the_moon_map.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/12694779714.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/nodazupinajinoxaxibexo.pdfIn PDF document text
    • http://fekivefutetowet.rf.gd/21583899645.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/refetidoluzegaxusumopagul.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/fapuje.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_off0001044b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 5568 bytes
SHA-256: 5702eec419d7c869fe0c0c2eb6ee649525dcfe1c9ecbbf19b3e3391ea6731011
font_01_sfnt_off00011720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11720 10792 bytes
SHA-256: 50ae0fa0d2fc6e901d07d1e3e29bbeaadace26a3ca8c5941b04d1ba5c98bdf7f

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