Malicious PDF — malware analysis report

Static analysis result for SHA-256 38862b5cb6377525…

MALICIOUS

PDF

35.0 KB Created: 2020-10-06 19:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e9b20d514e67eb6acefba7afbd5ef20d SHA-1: 3c41335f04d30c9b3c5bf74a87e4e282823aa42a SHA-256: 38862b5cb637752587da1050369a71d39b7b24af23f5587e424d75b4c93a4df7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to disposable hosting, and one specifically to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'boboiboy the movie 2' and the malicious URL, suggesting a lure to drive traffic to potentially malicious content. The ML classifier also strongly indicated maliciousness.

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://gettraff.ru/strik?keyword=boboiboy+the+movie+2++720p In PDF document text
    • https://site-1036965.mozfiles.com/files/1036965/lulomukalogozamakadu.pdfIn PDF document text
    • https://site-1037911.mozfiles.com/files/1037911/35623995371.pdfIn PDF document text
    • https://site-1039413.mozfiles.com/files/1039413/bezukaxexipopovip.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/57392688674.pdfIn PDF document text
    • https://site-1038794.mozfiles.com/files/1038794/16890302954.pdfIn PDF document text
    • http://files.makergirlz.org/uploads/1/3/0/8/130813841/2527826.pdfIn PDF document text
    • http://files.petemichels.net/uploads/1/3/0/8/130813458/zoketipupek_pakijogupujuza_zuvorujezul.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://cdn.shopify.com/s/files/1/0440/6158/9669/files/36104233037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1850/1799/files/rifle_laser_sight_distance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0398/8126/files/the_street_of_the_canon_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d0ce9c-c11a-4475-a211-f470673070ec/56689981325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b117492e-56cd-4023-9d95-92d6fe414cc0/81173187544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0c0b7e5-9b88-40eb-87a0-08b41378224e/takin.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_off00003fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FE0 4932 bytes
SHA-256: c186dc5fb31502baa58b4bda6813a5c8ec47cf866a82d6e6ec39e3b7f471a189
font_01_sfnt_off000050bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50BC 9484 bytes
SHA-256: f6cd73ef291698500b12a6a6a36a5f2e68422bccf0652396f636155c98464418
font_02_sfnt_off0000712f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.