Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2eb69ddfa93a268…

MALICIOUS

PDF

77.5 KB Created: 2021-04-03 02:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e8e2097149dbe8fcec427c8ec87b3bd0 SHA-1: 282970614e9fc416bf14cb0de0d6f1e6d4978054 SHA-256: e2eb69ddfa93a2681e9d012cd604cdf88767943f79d70266f1bb0985ce2b01c1
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a large number of embedded links, many of which point to disposable domains and are likely part of a link farm designed to distribute malicious content. The primary malicious URL identified is 'https://crophysi.ru/strik?utm_term=how+to+be+a+performer+at+work', which is flagged as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://crophysi.ru/strik?utm_term=how+to+be+a+performer+at+work In PDF document text
    • http://lalashoppen.online/how_to_use_parrot_ck31002ej1m.pdfIn PDF document text
    • https://fidedelab.weebly.com/uploads/1/3/4/0/134096197/zizawifafanewusox.pdfIn PDF document text
    • http://tezosomebapixim.22web.org/luvopux.pdfIn PDF document text
    • http://tevajevidiwa.22web.org/21216918151.pdfIn PDF document text
    • https://fegenogo.weebly.com/uploads/1/3/5/9/135981842/9504055.pdfIn PDF document text
    • http://life50it.pro/32193864124qhkws.pdfIn PDF document text
    • https://wenojuzak.weebly.com/uploads/1/3/4/2/134265903/zidanoxatilo_kurewiref_xubavolu_gimererametub.pdfIn PDF document text
    • http://arevakar-travel.com/10799768851ev1b8.pdfIn PDF document text
    • https://lirisuvobuku.weebly.com/uploads/1/3/5/3/135399047/gusuxu.pdfIn PDF document text
    • http://beamorem.com/australian_visit_visa_form_1418mosxa.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/piwanisaj/40759932015.pdfIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_44930060583c4d4b96c69755f6ba1b60.pdf?index=trueIn PDF document text
    • http://vilobeve.rf.gd/building_construction_illustrated_2nd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/kenwood_ts-_570dg_review.pdfIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_dc2a04f60b1949a3b86a373abd8ab992.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mukutud/jimejogidegatuxoza.pdfIn PDF document text
    • http://tenefotozefuzuw.rf.gd/poemas_de_fernando_pessoa_em.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/all_hatchet_books_in_order.pdfIn PDF document text
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_d7a0974acd384b5dab5313ea2c77566a.pdf?index=trueIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_c1c65cab6deb41258c2472b50fe1f67e.pdf?index=trueIn PDF document text
    • http://botejesojami.epizy.com/53678697397.pdfIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_275cb8f3746e45759a35c897821700c3.pdf?index=trueIn 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_off0000f3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AA 5096 bytes
SHA-256: 43c4c7428aaa93dcfa825296ca8c76ff43b7fd3b1bab876cd30c571d5deacc29
font_01_sfnt_off000104fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FE 10560 bytes
SHA-256: 98bd3aef2b4a89e82eadd1e97d55afd83470ef6d5ec1f6c1da48b33e4bc940ae