Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ada8264fea7dec…

MALICIOUS

PDF

79.6 KB Created: 2021-02-22 08:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9086513ef0934021de80db91b8338340 SHA-1: 5dae3f7fea8032553ba49c742a08e234cac174e2 SHA-256: c3ada8264fea7decea93f1e1424a3bbfef6ed12930e29cdeee4f2666075d9072
304 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its role as a link farm and credential phishing lure. It contains numerous embedded URLs, several of which point to known malicious redirectors or disposable hosting, and one specifically impersonates Apple for credential phishing. The ML classifier and ClamAV detection strongly support its malicious nature, indicating it's designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical 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: action link to abused redirector https://xafokakiza.weebly.com/uploads/1/3/2/7/132710638/cbdfbecf8.pdf.
  • 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/123?utm_term=how+to+use+thinkorswim+paper+trading In PDF document text
    • https://cdn.sqhk.co/xutazazo/zhfihjd/calendar_2020_november_printable.pdfIn PDF document text
    • https://xafokakiza.weebly.com/uploads/1/3/2/7/132710638/cbdfbecf8.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/vevawuletiteva.pdfIn PDF document text
    • http://ruwaxidalemib.iblogger.org/15731321833.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/KigfB0o/electronic_drum_set_price_olx.pdfIn PDF document text
    • https://judozolu.weebly.com/uploads/1/3/1/4/131407514/nigenomopopafa_numuman_beloso_bakifakatu.pdfIn PDF document text
    • https://mirepabokotixiz.weebly.com/uploads/1/3/2/7/132712407/xebepiza.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/jZhfjjn/59753673383.pdfIn PDF document text
    • https://vijunefuk.weebly.com/uploads/1/3/4/5/134588972/9008714.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/0idnRih/hotel_panic_button_laws.pdfIn PDF document text
    • http://juniwasobevi.22web.org/free_geometry_worksheets_grade_3.pdfIn PDF document text
    • https://fukenotaza.weebly.com/uploads/1/3/2/7/132740373/e1e1d5c71c0.pdfIn PDF document text
    • https://lutomired.weebly.com/uploads/1/3/5/3/135316507/kexujenawinoligewora.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/bhcqge1/vipar.pdfIn PDF document text
    • https://pisolapep.weebly.com/uploads/1/3/4/6/134648883/zulogi-sikumix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuxiguzemafuj.rf.gd/example_project_communication_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/fannie_mae_appraisal_form_2000.pdfIn PDF document text
    • http://begosene.epizy.com/76531636334.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/megozevaduviwili.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/key_account_manager_resume_templates.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_off0000f728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF728 5460 bytes
SHA-256: b24492f3ad50ffa6f869375dc24496d77ad16af2c3bcc9c7577967605ad458dd
font_01_sfnt_off0001099a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099A 11008 bytes
SHA-256: 1ed027f09f3f34863ebfbd59287b57012de8581d1d8438b29edefb0cae34c4a8