Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0d3e24967dfea2…

MALICIOUS

PDF

79.1 KB Created: 2021-02-25 11:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 17190d0818a4f3a4f6be6d1e9e836d90 SHA-1: 397d3988741cec7d341e899c942c28c221fdcc60 SHA-256: ee0d3e24967dfea240d28a1316735e7b0a92e40730d6134a3884412d79690b61
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm designed for SEO spam. One of the primary external links points to a URL that appears to be a lure for users searching for mathematical formulas. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wix?keyword=formulas+de+derivadas+trigonometricas PDF link annotation
    • https://pojixaguwor.weebly.com/uploads/1/3/1/4/131453565/gifolotufi.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/dgfjjJo/zediparesakonewojedudas.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/WPghs80/86356421281.pdfIn PDF document text
    • https://jodowofimen.weebly.com/uploads/1/3/5/3/135330599/xunonevameg.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/diragotasunononanenuk.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/hp_photosmart_d110_printer_wont_print.pdfIn PDF document text
    • http://pataboju.iblogger.org/adachi_to_shimamura_light_novel.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/the_sea_of_monsters_summary_shmoop.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/zewimu/urto_completamente_anelastico_formule.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/fizz_guide_probuilds.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/forenajurevixadalajuve.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/the_power_of_positive_thinking_book_download.pdfIn PDF document text
    • http://jipowefata.epizy.com/bollywood_movies_2014_mp4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/fb_ambalama_photos.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF32 5272 bytes
SHA-256: 7e00292cebbf04ae139dc885603fe9e5e4d1061dd06da2d6f2f0aaff84879cba
font_01_sfnt_off0000f113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF113 11628 bytes
SHA-256: ed9a35b293e7f622d6020ee89a94844fafa771451b89b8f6158a75e18d6b1104
font_02_sfnt_off000116d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D1 16556 bytes
SHA-256: b49f9d418e0fdd288b262f9082fbe1482bc2e2466742ef1e4f74bd4177ac3fd2

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