Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5134ada94022ac…

MALICIOUS

PDF

82.5 KB Created: 2021-05-10 20:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 38be3abb739d944a1d48f51fbb52ce66 SHA-1: 4330a0f1739a0506e680a267610235f63363e52f SHA-256: 1d5134ada94022acc762bb2e24f68359f631a1718da64a3714863c2a93109922
256 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical detection for brand-impersonation credential phishing targeting Facebook. The document body, though heavily obfuscated, contains references to Facebook credentials and a URL that likely serves as a redirector to a phishing page. The presence of numerous external links, many pointing to PDF files, suggests a link farm or SEO poisoning tactic to distribute the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/0440851867.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://zajinet.ru/strik?utm_term=how+do+i+recover+my+facebook+email+and+password PDF link annotation
    • http://italia-doc.space/zilunexavodixifenabbr7jq.pdfIn PDF document text
    • http://lemiritafuwab.22web.org/keluxexoxepujazonazi.pdfIn PDF document text
    • https://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/0440851867.pdfIn PDF document text
    • https://salabupomisopef.weebly.com/uploads/1/3/4/6/134631393/5762b9f39f.pdfIn PDF document text
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/d0969e7817a.pdfIn PDF document text
    • http://ru-dev.xyz/hurrian_hymn_no_6_sheet_musicvq4j7.pdfIn PDF document text
    • http://busivel.xyz/jeopardy_template_for_powerpoint_with_soundunncv.pdfIn PDF document text
    • https://gumijaxedug.weebly.com/uploads/1/3/4/5/134529094/5764473.pdfIn PDF document text
    • http://passive-income.ru/nojugazorifafidipiv0zyi.pdfIn PDF document text
    • https://depularo.weebly.com/uploads/1/3/4/6/134601330/5064089.pdfIn PDF document text
    • http://wisitens.online/what_is_international_school_syllabus_in_indiacxxwv.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/kopisigapub/15846922010.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/27131725679.pdfIn PDF document text
    • http://bupozefi.epizy.com/bubapifabutazewile.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/53956678193.pdfIn PDF document text
    • http://darozux.epizy.com/23840911506.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/formule_pour_calculer_le_nombre_d_or.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/zonasidubowuwaveruzanager.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/jesowameba.pdfIn PDF document text
    • http://mojipanitupawo.rf.gd/38568912897.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_off000101e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E1 5720 bytes
SHA-256: f1996d28e777bb43114448e52bb16d45446e4148460b2286be2e41bd65c07bde
font_01_sfnt_off00011554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11554 11340 bytes
SHA-256: a6789e796de1c7abac28fdceb3c4cd70c073fc6736fd6f1b347b543432579876

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