Malicious PDF — malware analysis report

Static analysis result for SHA-256 a889e79ff63d4955…

MALICIOUS

PDF

83.1 KB Created: 2021-04-04 19:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c85ab2212f30439614b0b3879dde5ad9 SHA-1: 8e512263b2fc97d4fedec9c38daf89e057a67d8d SHA-256: a889e79ff63d49553c807af2f83f346a204ea9b25a5dead2240741b79af6b382
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards techniques used for initial access and potentially further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://ponafet.ru/award?keyword=bioethics+principles+pdf PDF link annotation
    • https://fobaripiso.weebly.com/uploads/1/3/4/4/134443650/kowimuwepiwowuj.pdfIn PDF document text
    • https://nolemidu.weebly.com/uploads/1/3/4/5/134584078/4393473.pdfIn PDF document text
    • http://xopasiwaxenoj.iblogger.org/resekigoluwavo.pdfIn PDF document text
    • http://raruvutemogogog.iblogger.org/pumixitobo.pdfIn PDF document text
    • https://fivipogokofabid.weebly.com/uploads/1/3/0/7/130776003/6215942.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/d68807b34a82a2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bupelasupur.epizy.com/metro_map_mumbai.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/47690536646.pdfIn PDF document text
    • http://gujomodezeroj.epizy.com/a_praying_life_discussion_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/42472113227.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/year_3_maths_homework_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/bcma_fee_guide_a00032.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/how_do_i_create_a_gantt_chart_in_excel_2019.pdfIn PDF document text
    • http://litezopufesox.epizy.com/polycythemia_in_neonates.pdfIn PDF document text
    • http://tanatanozososud.rf.gd/kozewatigotune.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/customer_order_form_ielts_listening_answers.pdfIn PDF document text
    • http://bupixifebinare.epizy.com/history_of_islamic_architecture_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/htc_desire_eye_touch_screen_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/27439802375.pdfIn PDF document text
    • http://wegefug.rf.gd/adobe_flash_player_11._0._0.pdfIn PDF document text
    • http://volapubexu.epizy.com/6th_grade_short_reading_comprehension_worksheets.pdfIn PDF document text
    • http://xazogugikuriwox.rf.gd/apostrophe_rules_and_practice.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_off0001072d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072D 5084 bytes
SHA-256: e2d97aac53c68ddaa1b86da1fecaf844783cde5ee6fd13d263406cd9b0e0dec0
font_01_sfnt_off00011875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11875 10792 bytes
SHA-256: 875087287bde3078d680c5dc7774885ca88c3fa85a58053ed0df2140890af6e7

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