Malicious PDF — malware analysis report

Static analysis result for SHA-256 f564042cc0a2acee…

MALICIOUS

PDF

48.3 KB Created: 2020-10-28 12:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 780651f0c84d7dfec84c99ba2b870a1c SHA-1: 13bb4be89ed2c3746261aedcc774b637bc5c3c36 SHA-256: f564042cc0a2acee897b3d1864035e06446aca27d6c2d13803859f36ffc5e775
214 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one identified as a malicious redirector, and another impersonating Microsoft to lure users into credential phishing. The document body, though heavily obfuscated, contains URLs that are part of a link farm designed to improve search engine ranking for malicious content. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to phishing sites.

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://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/3ce57d4e8e.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://ggtraff.ru/123?keyword=the+things+they+carried+themes+and+symbols In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_5f989b4b30270.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/3ce57d4e8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5f8caceb1e345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388183/normal_5f97b49263cf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426271/normal_5f9901a012a98.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409998/normal_5f92c7dcc5a85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5f8a4e16396cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383308/normal_5f96430f70beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_5f93f7f0e5cf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5f955aaa5361b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f95a1f727f5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377905/normal_5f971ea0d38ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/409533d0-c47c-41d3-843f-c64e45efe04a/secret_rhonda_byrne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d94eaf21-1707-4ab4-a3f3-8ab09065ce88/86251576200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155bea33-305d-4d7d-a73b-b2758757a579/t2_bakiye_nedir_az.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ead7fd-3bfe-424b-b633-b0743db218e9/givawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2e06ac-4929-4c39-872b-900fadd92449/94743579654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b7fdf7c-d465-4c96-a9c7-a3e93df9971a/25198553600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ff764a-d3ba-415d-9505-78a077936576/67491052075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50bf679d-c1c3-4ae8-a310-bde4e99faad7/foxiwitoxerigurejifokebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e155c8d4-8cc9-493b-ba26-44b4121a05e3/harry_potter_sheet_music_french_horn.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7199 5332 bytes
SHA-256: aeee7f31bc8f7da71cd238acf98c98669a98daa30ab3c3190fde4a635b93fc39
font_01_sfnt_off00008382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8382 9904 bytes
SHA-256: 0f6bad1031289eedc8d9e5c58f082ec199187645229f84f68f4a2bc08d024efb
font_02_sfnt_off0000a556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA556 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2