Malicious PDF — malware analysis report

Static analysis result for SHA-256 93559951ded5e492…

MALICIOUS

PDF

80.8 KB Created: 2021-03-16 20:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cbf29acae0a9625ed78aa0d50ef83336 SHA-1: 22009297d1b867b9c6082cd67ea2d5a269761d0d SHA-256: 93559951ded5e4929eb4d4ad5e4a0b4e0edadad126e8bca9d22abb914c176240
314 Risk Score

Malware Insights

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

This PDF file contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a lure for payment redirection or credential phishing, impersonating Bank of America. The embedded URLs and the document's structure suggest it is designed to trick users into visiting malicious sites. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pabidiwamudobav.weebly.com/uploads/1/3/5/2/135299897/3901765.pdf.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/award?keyword=credit+check+authorization+form+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4494889/normal_603c643bdae7b.pdfIn PDF document text
    • https://pabidiwamudobav.weebly.com/uploads/1/3/5/2/135299897/3901765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392658/normal_6016e19d7f881.pdfIn PDF document text
    • https://soxigirotum.weebly.com/uploads/1/3/0/9/130969819/nanexipux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_603e3f2e1a888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_600df8a44a550.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_5ff0753746516.pdfIn PDF document text
    • https://loxuvamozevu.weebly.com/uploads/1/3/4/3/134310095/popurixewa-taxariguduluxuv-magaxaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464700/normal_604692d1f18df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404285/normal_601990d0ae174.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414687/normal_5fc8730a25c7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5feb9f5f4ebb3.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/8cca386f-9d48-4d9e-8715-7c550f5e0f1a/55993630922.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/what_do_developmental_delays_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc19a08-f599-468d-91d0-6e5a4cbd607a/lenudoxobumotemozixuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38649eb4-ca91-4976-bb42-da616760f2e3/multiple_intelligences_gardner_1983.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/algoritmo_rsa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b013770-51af-4dab-8ee7-24f73866f6dd/word_for_nonviolent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a2dfc7b-a286-47af-9149-687640ff84ea/walmart_pharmacy_phone_number_in_independence_kansas.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/mesilupipizemijaxotojav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c744ec6b-f44c-4dcf-9179-ff0f7f933953/lineamientos_de_los_consejos_escolares_de_participacion_social_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca951275-6ac1-43f8-923a-d0954efbc47e/roadside_picnic_audiobook_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/pak_navy_jobs_2021_for_female.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_off0000fdca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCA 5204 bytes
SHA-256: 1ae8da861dfc0f7bd79debdacb5b7fb6a63fafafdf8e74d160e906043b4dc6c6
font_01_sfnt_off00010f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5B 10572 bytes
SHA-256: 53db8209656cca84130c0a97c37a93c647c79bff58541c9514b9affa425788a9