Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d7d46e2a8adda3…

MALICIOUS

PDF

86.4 KB Created: 2021-03-19 22:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 91e72d0af11450db604917ee07315d34 SHA-1: 6b2a67409d5a39f8e80e924bba151b22b730c713 SHA-256: f2d7d46e2a8adda3ac1c7779da81ee6ec81bab400dd086c887c9160716711dff
184 Risk Score

Malware Insights

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

The PDF contains embedded links directing to known malicious redirector infrastructure, specifically 'https://yafferge.ru/strik'. The document body, though heavily obfuscated, contains text that appears to be a lure related to legal representation. The presence of numerous links on disposable hosting further supports a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=can+a+lawyer+represent+you+without+a+contract In PDF document text
    • https://cdn-cms.f-static.net/uploads/4475203/normal_60146993e5165.pdfIn PDF document text
    • http://badgesverified.com/wimivumegasoxa0prdq.pdfIn PDF document text
    • http://poroda.site/dusetegaccgjp.pdfIn PDF document text
    • http://slampochka.ru/figexozojond3w9.pdfIn PDF document text
    • http://mebel-albero.ru/how_accurate_is_tissot_powermatic_80i56h1.pdfIn PDF document text
    • http://cetapp.xyz/gibirobuwomatasugubusokerqk1ir.pdfIn PDF document text
    • http://fruktovik.com/siwasigegabinumn928.pdfIn PDF document text
    • http://phrensy.co/galebenazopirijokixa61sy3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416326/normal_6008d4b71ab68.pdfIn PDF document text
    • http://tesocoin.online/5755488900956jad.pdfIn PDF document text
    • http://talkme-news.info/never_have_i_ever_cast_fabiola_crushjwg3j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485172/normal_601e07b3874ab.pdfIn PDF document text
    • http://adv-workshop.site/microsoft_outlook_poll_multiple_answersg8mzx.pdfIn PDF document text
    • http://graatorama.space/51908288639htcoi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449205/normal_6044fbb229b27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c58b417-6db9-4762-bfe9-e4d2e718070a/create_your_own_website_uk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/kiwolivunij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e288b5f-7048-486c-be5e-3b884974b18c/vafufumupapokez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a34b715d-cda3-4196-b2ac-d08b1b28d53d/summer_waves_pool_pump_assembly_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/multivariate_time_series_analysis_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/vulizerabuvuterikuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349d8817-b190-4fe1-9d40-0a73bd16c4eb/alexander_the_great_generals_names.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/lomibutiniribesijiwo.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_off0001169f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169F 5120 bytes
SHA-256: 8b78feb4943101ace20c0b4271077645e4817c4887a49078fa4966fa92a43ebc
font_01_sfnt_off0001281a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281A 10804 bytes
SHA-256: 0b1c2c8d974cba2963bb2636eb058026702125e795684b0905f08f7d9dbad7ce