Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f0d9325a739455…

MALICIOUS

PDF

78.0 KB Created: 2021-03-01 21:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0b2fe45b94963c4cd6aedcb208e2e773 SHA-1: db416b50f7a3925b4444be1dbecc0bbfe8679894 SHA-256: e0f0d9325a73945584cbcba9a66e7b58530e5528be11e664e30024f5d7707c6e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to educational content, specifically 'how to find the angle measures of a right triangle', which is used to drive users to malicious domains. The presence of external URIs and link farm heuristics indicates a phishing or redirection attempt.

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 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://midufefew.ru/123?utm_term=how+to+find+the+angle+measures+of+a+right+triangle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387419/normal_602e21d84e5a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412174/normal_5fe829a0349d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414342/normal_5fef443a90cf4.pdfIn PDF document text
    • http://sobofikikovir.22web.org/guided_reading_levels_for_parents.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/fenumutojuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/OehjKjc/negative_space_drawing_easy.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/happy_birthday_balloons_gif6dm6l.pdfIn PDF document text
    • https://cdn.sqhk.co/kusedesomawa/SibPHjd/joplin_mall_stores_open.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/bagopavefipibefinijaz.pdfIn PDF document text
    • http://busigexexowo.22web.org/is_there_a_part_3_of_twilight_breaking_dawn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_6016a888c408a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://falufobi.epizy.com/fibif.pdfIn PDF document text
    • http://logasexa.epizy.com/90195716318.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/the_basic_works_of_aristotle.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/cribsheet_by_emily_oster.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/weber_spirit_grill_e310_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/jazz_blues_music.pdfIn PDF document text
    • http://gaditerigasut.rf.gd/arya_2_movie_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/blender_text_tutorial.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23E 5376 bytes
SHA-256: ae3f2851e87a1f80454a3f13eaf0f6ed0df3499f40f1691734f2225b6e8fd139
font_01_sfnt_off0001046c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046C 10428 bytes
SHA-256: 7849b802d91a02ba5564521ec7957d30add88874e05ea5c15805213ced4787d8

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