Malicious PDF — malware analysis report

Static analysis result for SHA-256 e90d08274c955833…

MALICIOUS

PDF

78.7 KB Created: 2021-04-06 06:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2244ba28ef6b5d6244e2ef9fecf5c42b SHA-1: d756b50af17da110666eebc8b2c1cd1ba642dccd SHA-256: e90d08274c9558330f99150340348df0034519ee6709db414b73d1942c6ab37c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains multiple embedded URLs, with a primary one being https://ponafet.ru/strik?utm_term=learn+english+grammar+hindi+pdf, which is likely part of a phishing or malware distribution scheme. The PDF also exhibits characteristics of a link farm on disposable hosting, further suggesting malicious intent.

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://ponafet.ru/strik?utm_term=learn+english+grammar+hindi+pdf PDF link annotation
    • http://andyhong.blog/7490993814yrdus.pdfIn PDF document text
    • http://itverys.space/terovirirelipibodubukfvcti.pdfIn PDF document text
    • http://wijebibot.iblogger.org/aadat_ninja_song_video_hdyaar.pdfIn PDF document text
    • http://potaberukogox.66ghz.com/boxugaserezutekafajigupim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8b62b971-d575-4461-ae89-9de7a2afac08.filesusr.com/ugd/c5a911_0d43a92d5e69445b8a05ff57c560a011.pdf?index=trueIn PDF document text
    • http://pumuroxojab.rf.gd/abeddy_ngosso_kimbilio_langu.pdfIn PDF document text
    • http://sugexure.rf.gd/free_printable_fundraiser_flyer_templates.pdfIn PDF document text
    • https://8ea4a4fb-2859-49e6-8c89-66ed49166bb4.filesusr.com/ugd/0088c1_9c55ee70c3b046c280ee6d1a12547561.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff33141b-1d20-4bfe-888a-449fcc3d2191/89727488676.pdfIn PDF document text
    • https://3a7b682b-4b85-4b21-836a-a34929c8735b.filesusr.com/ugd/0cd3a8_a6427c84289e4eb8831d5ce9944d81a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0230c45-b46d-40aa-8dcb-f706b36649d3/vifizoxepewesiruletusa.pdfIn PDF document text
    • http://galusuvojames.epizy.com/les_miserables_staged_concert_cast_list.pdfIn PDF document text
    • https://42f4b946-f871-4f2a-a73e-6571c6569919.filesusr.com/ugd/e20521_6bbbb62b40324052beabf909742c015d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf13cc2e-1beb-4a1c-ba1a-d5036031dd72/skin_so_soft_uses_avon.pdfIn PDF document text
    • http://leduvusiluvev.rf.gd/norugawof.pdfIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_9845d2770f234480a97cd36e77c15e47.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ecec8c6-599f-4d07-8ee1-5c4c7b2f7599/how_to_use_a_cleanser_gel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e0cfdb-7ef0-497b-be22-d1a4ec7702cc/xered.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_off0000f505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF505 5396 bytes
SHA-256: aca9ddaf80699f5a6bb14696022f16377651c31965797d345b76d47dd3c25b57
font_01_sfnt_off00010737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10737 11228 bytes
SHA-256: 8ca741d4518d9506df0b685ce7fa1fdc71d245aad5dd47f49d7d8f3a2c632040

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