Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c82991ffb77b69…

MALICIOUS

PDF

75.3 KB Created: 2021-03-16 08:17:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 862cad3d5bf2ef05864a19340103c80f SHA-1: 475dc99e6bc0812c22747088cfc8e4b6c9241340 SHA-256: 79c82991ffb77b69b9b9d3e58fd79247e29cbc66ce61b4d3a46c44b45321cd0c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary link pointing to a suspicious domain that appears to be a lure for 'Materi apbn dan apbd pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. While no scripts were explicitly extracted, the PDF structure and numerous links suggest it's designed to redirect users to malicious content.

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 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://druttle.ru/award?keyword=materi+apbn+dan+apbd+pdf PDF link annotation
    • http://pifowovumuwe.medianewsonline.com/printable_chess_score_sheet.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/tekapimelakomibupekasu.pdfIn PDF document text
    • http://fuxofexafot.iblogger.org/60587420770.pdfIn PDF document text
    • http://xupokaxe.medianewsonline.com/chicago_style_capitalize_job_titles.pdfIn PDF document text
    • http://kulanefimolon.mypressonline.com/the_ugly_duckling_short_story.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463543/normal_5ffcd5ac70db8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408995/normal_603524210b23d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_605042d38263b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463543/normal_5fdf519925a5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412394/normal_5fd70bf7f3dd9.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/befarekogol/39174896681.pdfIn PDF document text
    • http://vobazajeg.rf.gd/33636138396.pdfIn PDF document text
    • http://livirava.atwebpages.com/history_alive_online_login.pdfIn PDF document text
    • http://buzuvemujogumob.epizy.com/cake_pictures_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/sinkmaster_750_1_2_horsepower.pdfIn PDF document text
    • http://kawerulim.onlinewebshop.net/51183726439.pdfIn PDF document text
    • http://sozofini.epizy.com/wibovido.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_bd3e272a62aa4835a0ccd7b122dddcb5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genedesowul/33280716933.pdfIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_303f19b346ce4d379e3593daf920b044.pdf?index=trueIn PDF document text
    • http://buzuvemujogumob.epizy.com/sony_bravia_internet_tv_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/java_jdk_se_9.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_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 4972 bytes
SHA-256: 6819dddc9c8b0492c8a847aecb2187ee775873085126f47f8168bbf4b42db8c8
font_01_sfnt_off0000fdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF3 9992 bytes
SHA-256: 7ef92a95589947dcb6da92c13232671805e262dc2a3b3650777c03071b942cc0

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