Malicious PDF — malware analysis report

Static analysis result for SHA-256 e300f630827be470…

MALICIOUS

PDF

42.9 KB Created: 2020-10-28 21:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c7b1a2786de17944e759efce571bc657 SHA-1: 34f55e8d5eac0cd605208c3e422e223fd18438a3 SHA-256: e300f630827be47020839ca1ad946727e0c459641ffca1c0c2df7cdb9e11d6ee
214 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for brand-impersonation credential phishing, specifically impersonating Facebook. It utilizes a redirector URL to lead the user to a malicious PDF, which is part of a link farm. The embedded URL and the redirector link are the primary indicators of malicious intent, suggesting a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://munulibur.weebly.com/uploads/1/3/4/5/134508804/cdee4b7409b6b3.pdf.
  • 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://ttraff.link/123?keyword=converting+fahrenheit+to+celsius+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f8faf0e869be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f92ac1d60d01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_5f98092938ad7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f876046d47fb.pdfIn PDF document text
    • https://munulibur.weebly.com/uploads/1/3/4/5/134508804/cdee4b7409b6b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_5f8abb1b8fd7b.pdfIn PDF document text
    • https://tamegafatukof.weebly.com/uploads/1/3/4/4/134400059/zobiwewawebu_lonik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_5f928284cc41a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_5f88d2feee5ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5f8fb2fe12336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5f8e613df0c72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f8a9307a76c5.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/7b5306a1-5540-4936-b751-182f4cc6cec2/45207257098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1091ff20-44fb-416b-a953-a6d9a2650e78/torres_de_hanoi_algoritmo.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/sowis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d47f0d28-c9a4-4719-aefe-14a85b490e6f/jexiredikajuporimudiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd9cc00-7abe-4eb9-af69-019633e8fbd2/carnegie_mellon_letters_of_recommendation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6aa0d52-11e6-4a37-b4bd-474f20aeb867/folegolaselebigobanam.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/tibudozenowevugevezelik.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/8661810389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86771dad-a5cc-416f-b246-6cd63d0e587e/bifiraxub.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/appropriate_preposition_list_with_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/definition_of_comparative_public_administration.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_off0000682a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x682A 5264 bytes
SHA-256: d6c72d32195a1af5b92191480482282d19ccc3e498c802765694cc8060272d05
font_01_sfnt_off00007a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2A 10596 bytes
SHA-256: eae92b4d8843d50b457c5bc606d871c592e4206a4eeddee537e32791feb2569b