Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fafc1b8e79c177c…

MALICIOUS

PDF

83.5 KB Created: 2021-04-05 13:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 15c5ce375ae11676ea3a86d8c27d72f5 SHA-1: f860050b132500ed09f618cf48244366a7e4f060 SHA-256: 6fafc1b8e79c177cf8611c6a6e4b01b7ee1d23df8e12829886a4221b60159704
324 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1059.007 JavaScript T1190 Exploit Public-Facing Application T1204.002 Malicious Link

This PDF document impersonates a Facebook login recovery page to phish for user credentials, including one-time codes or recovery phrases. It contains multiple embedded URLs, with https://crophysi.ru/strik?utm_term=facebook.com+login+recovery being a primary indicator of the phishing lure. The document's structure and embedded links suggest it is designed to exploit user trust by mimicking legitimate recovery processes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 8

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://crophysi.ru/strik?utm_term=facebook.com+login+recovery.
  • 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=facebook.com+login+recovery In PDF document text
    • http://zixaxagewan.mypressonline.com/11554386621.pdfIn PDF document text
    • http://jemulobapamiwu.mywebcommunity.org/free_printable_alphabet_letters_upper_and_lowercase_with_pictures.pdfIn PDF document text
    • http://namabal.scienceontheweb.net/autocad_3d_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486566/normal_5fcd8c7c9c12f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_6015b6a7ed306.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385612/normal_5fc841fd98378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_6044d641e3ce8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495409/normal_6051262cb1e45.pdfIn PDF document text
    • http://letabumo.getenjoyment.net/piwisitomebaneno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_e38ddf5ae3ed4c1089f14e7438090c9b.pdf?index=trueIn PDF document text
    • http://kofaxafogi.myartsonline.com/firirulopisis.pdfIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_2224e5a486aa459f806601a4d5a88ca3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/caciano_kuffel_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/sekadugipinafexat.pdfIn PDF document text
    • http://rupesujutiwu.myartsonline.com/77109861998.pdfIn PDF document text
    • https://535f918c-e50e-4760-9dbe-4b22a9cc1357.filesusr.com/ugd/65883d_c6f3f2f6ef234b839703d01e1ff6cd46.pdf?index=trueIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_ba863e0e729444df931f96e86558a922.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosevud/vaxutizazimenasagamuded.pdfIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_d213f2d9569d43a29737a371eb0f9d36.pdf?index=trueIn PDF document text
    • http://bugazepoja.onlinewebshop.net/mathematical_expectation_problems_with_solution.pdfIn PDF document text
    • https://ba9dc33f-61c2-415e-8598-c57272458a21.filesusr.com/ugd/c05727_cb6ec5979d744f449eb58f816d316ad6.pdf?index=trueIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_8882385a816649ee917c8fcc677a322e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/33473115776.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_off0001075b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075B 5292 bytes
SHA-256: a000ff0c848088ef85134af5727dfb2b314a1b8476575e21b8c16f97750fe09a
font_01_sfnt_off00011962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11962 11188 bytes
SHA-256: e8b34229c3802062cff107addd896cdd529247569103d2e5659a5595f186902a