Malicious PDF — malware analysis report

Static analysis result for SHA-256 95491f19a574a366…

MALICIOUS

PDF

76.3 KB Created: 2021-03-13 21:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7fb47e805bdf1adce50e447646710974 SHA-1: 68a14a4aac15535475ca5766507833340e7ff787 SHA-256: 95491f19a574a366d3ccbf7d0ece2051669440c8d819b48fcc425bd6acdb0b50
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a link farm, with many hosted on disposable domains. This behavior, combined with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a malicious intent to redirect users to potentially harmful content or phishing sites. The ML classifier also flagged this PDF with high confidence.

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 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.
  • 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://jottigo.ru/award?keyword=capitalism+and+freedom+fortieth+anniversary+edition+pdf PDF link annotation
    • http://jakufodunod.getenjoyment.net/four_past_midnight_best_story.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/hcZhcd6/84559271199.pdfIn PDF document text
    • http://ropisunofo.mygamesonline.org/33097809179.pdfIn PDF document text
    • http://gosunenibunale.getenjoyment.net/catalogo_hinode_ciclo_4_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wemopizajazo/uHkjdCm/big_fish_eating_little_fish_cartoon.pdfIn PDF document text
    • https://remoruputudedux.weebly.com/uploads/1/3/4/0/134017090/e79c6.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/0jcu53x/75848261118.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/h8ThaWl/carrom_game_board_amazon.pdfIn PDF document text
    • https://valijobeguxufa.weebly.com/uploads/1/3/4/1/134108929/a658e2c3b4a6.pdfIn PDF document text
    • https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/8688029.pdfIn PDF document text
    • https://kibowoje.weebly.com/uploads/1/3/0/7/130775027/zusalom.pdfIn PDF document text
    • https://fugejifok.weebly.com/uploads/1/3/4/1/134132056/vajimewukolenuvome.pdfIn PDF document text
    • http://bulufapisaf.iblogger.org/45800615284.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/interview_questions_and_answers_for_senior_executives.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xeganidirosup.rf.gd/gajopep.pdfIn PDF document text
    • http://jududupozibuj.rf.gd/ue_boom_2_speaker_size.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/gujarati_calligraphy_fonts_ttf_free.pdfIn PDF document text
    • http://kidexedobarali.rf.gd/22753657178.pdfIn PDF document text
    • http://vunonam.atwebpages.com/kegedozimizafumerurel.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/7th_grade_math_questions_and_answers.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_off0000ec01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC01 5348 bytes
SHA-256: 604625bfe211a4c9915067b7a4619779bcc2ffc521de95ea5e9a9345c7fec114
font_01_sfnt_off0000fe0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0C 11000 bytes
SHA-256: 4a1c27898aa33392ba50977b2d6db108059149c92d59796bdf5b746ad1ac79a9

Open this report in the interactive analyzer, or submit your own file for analysis.