Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a83535b732d1de5…

MALICIOUS

PDF

52.6 KB Created: 2020-10-17 19:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4867f125504354ffe1fa848da937e737 SHA-1: b0b6cd428c8cb31113840f01c77b210376b6d302 SHA-256: 3a83535b732d1de58d1ad8003b0925ecf08f2c8c004a3aca53d29b57b08caeba
184 Risk Score

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=richard+lustig+book+amazon In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f874e3ad2d13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f871043c5bdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f872a865ee4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5f88f9b1c31cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f894d4c3fecc.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/wubimevipuwepi-podop.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/8995262.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/vasare.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/fukun-zexepimikupi-jutanu-garibadile.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/safiwun_pijoroxu_xurad.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/tekorowudem.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/bd57e7d8-b1d1-4b52-a470-557d1a381e41/zetekirigoradunuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56fa54c3-dc10-4814-8be4-c5b7fb26a5fe/31240217610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952ce029-0bbb-4e36-b6eb-57d6009de134/natovejowonezuwif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/660404dd-0349-4e54-ba02-81cf45898bf1/rerugewewan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/108e9d9f-b8bc-44f0-aca3-66c816b98a84/domodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0719/5311/files/85131508056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2044/2529/files/mekabuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4145/6796/files/groundwater_webquest_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/803fd9bd-5ddb-4a1c-a9da-904a7ccfc9a0/jomuxuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a722c21-8390-431b-909e-b19126ea8a7f/4285229275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a27270-6897-43ff-af90-32dac1c42bce/jenor.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B5 5616 bytes
SHA-256: 4cf74035a2cd3540ff33ad63a95f18259e83222628ede13088b5980b024af9ac
font_01_sfnt_off000087af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87AF 11244 bytes
SHA-256: 9fd664400a72ed5affe36efd520bcdaa9929205d749aae3c084d71022462bf87
font_02_sfnt_off0000adb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADB4 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b