Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21612449e1209e8…

MALICIOUS

PDF

107.1 KB Created: 2021-03-16 07:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1faadcc4cc9eac4c1568ace8f8f97434 SHA-1: 5e4597f6184033c363ed3fde1ffd63d2236eb7c2 SHA-256: b21612449e1209e822524b2e7d704bbdbf6b1c03ead65c9ebd77b5976d1965cb
156 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs users to a suspicious domain, likely as part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_LINK_FARM' indicates the PDF is designed to host numerous external links, further supporting the attack pattern of directing users to potentially malicious content. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://fokemale.ru/wix?keyword=sly+cooper+bentley+gets+paralyzed PDF link annotation
    • http://gegebafebofad.scienceontheweb.net/oxford_bookworms_library_stage_6_cry_freedom.pdfIn PDF document text
    • http://wajofima.mywebcommunity.org/87591607772.pdfIn PDF document text
    • https://rojofasefimo.weebly.com/uploads/1/3/1/6/131636828/f7c922022a506.pdfIn PDF document text
    • http://finoginujowiwi.mypressonline.com/nabejonar.pdfIn PDF document text
    • http://hhizmet.com/carrelli_elevatori_manualipof0k.pdfIn PDF document text
    • https://tawozajoruje.weebly.com/uploads/1/3/4/3/134314125/23cbc.pdfIn PDF document text
    • http://goloszauniver.fun/jigipisavoxefitokesipupu75gy8.pdfIn PDF document text
    • http://warewakeb.sportsontheweb.net/novedumesibevaxavufit.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/jagux/69677045673.pdfIn PDF document text
    • http://zoxalojidud.epizy.com/farberware_single_serve_k-cup_brew_coffee_maker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/ashton_kutcher_wife_right_now.pdfIn PDF document text
    • http://kamiwivexa.epizy.com/tapejagu.pdfIn PDF document text
    • http://lixugojobipiwof.epizy.com/hillsborough_county_first_day_of_school_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/47187926741.pdfIn PDF document text
    • http://rovizomaguwex.atwebpages.com/role_of_branding_in_marketing.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/85912876930.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/oracle_dba_interview_questions_and_answers_on_rac.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/food_cost_inventory_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/what_is_hardware_input_devices.pdfIn PDF document text
    • http://junikelop.rf.gd/naserumivizigagijasojit.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/51292375334.pdfIn PDF document text
    • http://fotizerenodafik.epizy.com/scratch_1._4_projects.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/rca_25425re1_manual.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_off00016767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16767 5636 bytes
SHA-256: 0d6d931c9693b49dfa875132935dc06a945d0ed5d967a3c70663a470acd61bed
font_01_sfnt_off00017aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AAD 10604 bytes
SHA-256: 7f534ff9eff346a58687df681cd4b5104a06fe5c418c20b191bbfb9b8c3b70de

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