Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1b5ecbb82f3f6c…

MALICIOUS

PDF

82.6 KB Created: 2021-03-25 18:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f3eea2832f486d0979c3f7264bcc45e0 SHA-1: a03227e1c89afc308898daab6cc430ff5368debc SHA-256: 3d1b5ecbb82f3f6c270048a983c167c8dfcab5253543082564ed19f7c19bf135
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF document is flagged as malicious by multiple heuristics, including ML classification and ClamAV. It employs a payment redirection lure, impersonates PayPal, and contains links to external sites, strongly suggesting a credential phishing or scam attempt. The presence of embedded URLs and the 'paid to click ads paypal' keyword in the document body indicate the likely attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lonoripub.weebly.com/uploads/1/3/5/3/135319728/8098369.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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://xezojetit.ru/wix?keyword=paid+to+click+ads+paypal PDF link annotation
    • https://lonoripub.weebly.com/uploads/1/3/5/3/135319728/8098369.pdfIn PDF document text
    • https://bazunebusa.weebly.com/uploads/1/3/5/3/135397504/3451d1.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/sipubitizijen.pdfIn PDF document text
    • https://sovopedu.weebly.com/uploads/1/3/5/3/135301682/4395114.pdfIn PDF document text
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/6250707.pdfIn PDF document text
    • http://rufejupewanun.iblogger.org/51504308226.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/lijopavexanuse/dexoriboj.pdfIn PDF document text
    • https://633ee4a5-ef7f-4c35-8c02-ac6c60bc6361.filesusr.com/ugd/0ab374_1827fe712e1249569c37e35810fa1a9c.pdf?index=trueIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_29924300f9534812b15a9ec90fd18965.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/somisilegex/wefewamejagoxagizala.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/15785817356.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_396284445fb849329cc6704c3b202377.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juduk/chori_chori_song_salman_khan.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/nibaxegureke.pdfIn PDF document text
    • http://bavipilebevim.epizy.com/32345443963.pdfIn PDF document text
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_b9c479dc69be4d6fa32d82062b1115a8.pdf?index=trueIn PDF document text
    • http://duvedizokonidu.epizy.com/drowzee_pokedex_information.pdfIn PDF document text
    • https://ea0a6730-5b47-42bc-899c-5b27b21b32ea.filesusr.com/ugd/184298_cb4f1854446c45be95a737653ac20475.pdf?index=trueIn PDF document text
    • http://verafewema.rf.gd/what_not_to_eat_for_gastritis.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_off000104ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AC 5140 bytes
SHA-256: e23cadf8b78498cbd986a8f4a5ee88933c0d09a2aed4f17cc947fd5a42a581f6
font_01_sfnt_off00011647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11647 11476 bytes
SHA-256: 59a0f3c851a267774061794f1cee8df297540346fc79a0ec3d3ed2fd1b35cbad

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