Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5f24e9184de337…

MALICIOUS

PDF

74.9 KB Created: 2021-03-01 01:45:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 649ec46513d0e8c3d01cf07af22f7033 SHA-1: 48a85f42062258d76036313cdfa5aa069d0943d0 SHA-256: 2e5f24e9184de337d7b719592470073d06a2b30c32b439bcd9ccac956dea024c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/award?keyword=los+5+lenguajes+del+amor+libro PDF link annotation
    • http://mattelipsticks.site/champagne_color_formal_dressesvp3vu.pdfIn PDF document text
    • http://fabulouss.space/real_steel_2_full_movie_in_hindi_480p81dje.pdfIn PDF document text
    • http://wujejejifi.mygamesonline.org/bookshelf_computer_for_sale.pdfIn PDF document text
    • https://vipapixamez.weebly.com/uploads/1/3/0/8/130814430/7fd778972ca6e8.pdfIn PDF document text
    • http://hookup753.fun/bulking_diet_meal_plan_indiaqn1sl.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/final_walk_through_and_closing_same_day.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/70419735587.pdfIn PDF document text
    • https://kewakovek.weebly.com/uploads/1/3/4/4/134467638/8567557.pdfIn PDF document text
    • https://nidegezepon.weebly.com/uploads/1/3/4/6/134650885/mirubewoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_600c1eaf210d5.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/luwizogita.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dezinolabebosod.atwebpages.com/74118746931.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/relation_between_gdp_and_national_income.pdfIn PDF document text
    • http://fowimifefezujo.myartsonline.com/20978713605.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/pofirufesisane.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/set_relation_and_function_mcq.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6D 5228 bytes
SHA-256: 9a399c0ba4428b69968978aa459266092e4bb0e9ef4cec73fa2b8a5140fa0ef3
font_01_sfnt_off0000e017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE017 16072 bytes
SHA-256: 10c5db46f03cb37913d33206a595845cc3fbd82a1736505db53e8e6539f44d57
font_02_sfnt_off000110b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B4 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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