Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a55ac45e785cd7…

MALICIOUS

PDF

80.7 KB Created: 2021-03-24 12:29:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e770de1e8d08ca3f469119aa93ffa402 SHA-1: bf8dcf8fc7a7b85b43ad51af42acfadce99052a8 SHA-256: 08a55ac45e785cd7038f6d7b411186695dff7c839a57b2f0b00e659d33c47748
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links. The primary URL, 'https://vilenefex.ru/wix?keyword=does+pegasus+have+horns', appears to be a lure. While no scripts were explicitly extracted, the presence of PDF-specific heuristics and the nature of the links indicate a likely phishing or malware distribution attempt, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=does+pegasus+have+horns
    • http://numebixuxax.22web.org/present_tense_past_tense_future_tense_words_list.pdf
    • https://memarexegota.weebly.com/uploads/1/3/4/3/134366516/xikexiv_rusagetovona_fenufuvom.pdf
    • http://potegezufanizix.22web.org/vibasaturumu.pdf
    • https://xotukejurivaj.weebly.com/uploads/1/3/4/0/134016857/xevotunixipokug_furasaminarek_baxiloveranefe.pdf
    • https://cdn.sqhk.co/vafegijateno/arjjDgh/switch_pros_9100_install_tacoma.pdf
    • https://vorupegesozuzow.weebly.com/uploads/1/3/1/4/131453293/sumixu-badulixi-xuzanasel.pdf
    • https://vojituletakez.weebly.com/uploads/1/3/0/8/130874409/6f42174.pdf
    • https://cdn.sqhk.co/tepikipo/yjjbgeL/hope_diamond_pics.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuxejosijaja.epizy.com/law_of_logarithms_worksheet.pdf
    • https://b32e410f-f365-4205-840f-53103702c783.filesusr.com/ugd/51ece5_bca25abc236e424bb7ad1e30ee0fb55b.pdf?index=true
    • http://lopusewagini.epizy.com/5727183524.pdf
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_58de4ed5a08a4abca3367ef6c030f1b9.pdf?index=true
    • https://316b94d8-f1eb-4552-9621-e6dada6029ed.filesusr.com/ugd/4b675a_3f990df9eb784f229efd4243160664fb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/130d4128-1cd1-4bd5-9654-935d9549a366/star_trek_2009_online_free.pdf
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_af51d2b1c7984977be71472446de8df3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/102c03d0-6d8c-4345-b8a3-1d6a24b88a1e/kozibedafawe.pdf
    • https://uploads.strikinglycdn.com/files/b0df8d6a-8984-49e9-97fc-35e766b72121/forujawos.pdf
    • https://uploads.strikinglycdn.com/files/7b7364e8-03eb-4042-ad24-f08ba58ac5d4/default_combination_for_sentry_safe_s0210.pdf
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_ae6cce66634041fb929ace3bafcd5295.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c0f0e104-393b-4cff-89df-cc1771ee35b8/como_cambiar_a_un_lider_autoritario.pdf
    • http://zapatugewowawa.epizy.com/adenosina_injetavel_bula.pdf
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_c1e33015cf0a44f0afd058c989ac300a.pdf?index=true
    • 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_off0000fb73.bin
9067fac88a9997e12876fa0a2a2adff64b3a164947a4cbb1235373aaf7691c76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 5108 bytes
font_01_sfnt_off00010cde.bin
c40d050c1a90156d36318cfa54fb590fad7078f6e837be468cad69de5b95f41b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDE 11624 bytes

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