Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaca4051c9cf49dd…

MALICIOUS

PDF

78.5 KB Created: 2021-03-27 21:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8c09cc61bc5dc239082efc5789db9093 SHA-1: ed0456253d198287ce067e1c8cbadf6b1e72f78e SHA-256: aaca4051c9cf49dd788fae7f89a22dc396fe4b2a323e5dad64e42cb0759079c9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary URL being `https://soxebez.ru/wix?keyword=what+was+the+mayan+environment+like`. This URL, combined with the heuristic firing for 'PDF_SEO_LINK_FARM', suggests a phishing or SEO poisoning attack. The ML classifier and ClamAV detection further confirm the malicious nature of the file, indicating it likely serves as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://soxebez.ru/wix?keyword=what+was+the+mayan+environment+like PDF link annotation
    • https://lojigimab.weebly.com/uploads/1/3/0/8/130814508/3fe63a775db39.pdfIn PDF document text
    • https://lepabamun.weebly.com/uploads/1/3/1/6/131636917/1838244.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/ggyhghf/distributor_contract_template_free.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/dugegokisupoleb_retisa.pdfIn PDF document text
    • http://pisodaseveporow.22web.org/84584538732.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/Ojf4BM4/e_meme_gif.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/fakuguvil/malayalam_kambi_kathakal_app_free.pdfIn PDF document text
    • http://fereralud.epizy.com/muxiwenonesapaka.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/kugavitujetokus.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/usability_testing_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/jurofisovefitukeluwegin.pdfIn PDF document text
    • http://luxakekiketu.epizy.com/dexter_meme_template.pdfIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_df305bb3c61145da8ec2796030872d9c.pdf?index=trueIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_2c8e77a666b947d382dc5646e0dbad2c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/47037605049.pdfIn PDF document text
    • http://tawuzosidekelos.epizy.com/lanaruketaxigezo.pdfIn PDF document text
    • http://varuxaze.epizy.com/automatic_control_systems_tenth_edition.pdfIn PDF document text
    • http://binawojojin.epizy.com/ap_reorganisation_act_2014_telugu.pdfIn PDF document text
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_10f8e45c74364e19a4c434205f75402c.pdf?index=trueIn PDF document text
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_8d1ce32ccf6a4101a1abf0fd520d084f.pdf?index=trueIn PDF document text
    • http://sedijinuv.epizy.com/nelasux.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_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 5256 bytes
SHA-256: 855502c94a9fa539d6e5d4599d9cd4f82fb37285709bcd569b87ff4bbe8cf3ad
font_01_sfnt_off00010759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10759 11176 bytes
SHA-256: 0aa437b52fc1a49d22236a058549094be2c0bcb2ce21086a0969af1cddc74b9a

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