Malicious PDF — malware analysis report

Static analysis result for SHA-256 4edd06deb049d562…

MALICIOUS

PDF

78.6 KB Created: 2021-03-18 11:27:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89e5ad86047528dd1049b98c6c325017 SHA-1: 1f58d48ac928fed42a98ffed138d780482b4c87c SHA-256: 4edd06deb049d562607b8457c58f84c6f2a77823a78faeece1c227b623035778
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO poisoning attack. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous URLs points to a strategy of redirecting users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/award?keyword=asme+b31.+4+pdf+2020
    • https://pazibeze.weebly.com/uploads/1/3/1/6/131636707/vefidowalip.pdf
    • https://rurinigumiza.weebly.com/uploads/1/3/5/3/135350695/tagopowurukiwilar.pdf
    • https://kufojinelimipi.weebly.com/uploads/1/3/0/7/130776518/tujemosimom_fomipaduxiximem_bavuz_nefarefasi.pdf
    • http://fajasated.mywebcommunity.org/86017344004.pdf
    • http://vopibuxipem.22web.org/kill_bed_bugs_dryer_sheets.pdf
    • https://mefewenitili.weebly.com/uploads/1/3/1/3/131379946/91f33af811c488.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://somizifiwij.epizy.com/daphnia_what_do_they_eat.pdf
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_e885f55daeb047948d7a1dec29ccdfe0.pdf?index=true
    • https://6ba7316d-b84b-4ccb-a32a-103c856d4013.filesusr.com/ugd/91f37e_eeebfbdb8c0f4739b27020780288d7c8.pdf?index=true
    • http://lapobikajedive.rf.gd/french_greetings_worksheet_ks1.pdf
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_e0fb0ab260e54da5bd010137300360ac.pdf?index=true
    • https://s3.amazonaws.com/fomaralunex/boilerplate_template_wordpress.pdf
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_08fa08f9d979495fab0999363923568e.pdf?index=true
    • http://jukasuxoseki.atwebpages.com/bhu_bsc_entrance_exam_question_paper.pdf
    • http://rixigor.onlinewebshop.net/breadman_bread_maker_paddle.pdf
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_14459eb5ca0d4f36952995de0ffe564b.pdf?index=true
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_9daddb2d9af147eab99251724a7f8c3e.pdf?index=true
    • https://s3.amazonaws.com/xoferuzu/66711370140.pdf
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_c003bd0d072044b0aabcc246725e753d.pdf?index=true
    • http://zewomasajeguzud.epizy.com/scary_stories_to_tell_in_the_dark_movie_monsters_names.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f353.bin
6e129e9ce66c44fb259df29adc21250ec75bf603e8335c497033409223ce8145		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 5588 bytes
font_01_sfnt_off00010658.bin
ede77005a017500ed80661df9daa861f3a973c2d6a39e1bd9e6106f962bb3f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10658 11092 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.