Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e9613ef39e05b0…

MALICIOUS

PDF

42.2 KB Created: 2020-10-30 08:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 64664d7957d2cd99f0f68eeb9c9557e9 SHA-1: 3d5b7c756da1f026a25a6f8bc7ec0d792c4478eb SHA-256: d5e9613ef39e05b07b61624500e493e3aa42dace6d234a56a51e2fbb0352d8e6
124 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a known malicious redirector. The ML classifier also flagged the document as malicious. The presence of these links suggests an attempt to lure the user to external malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/123?keyword=fortune+persona+3 In PDF document text
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/8df037.pdfIn PDF document text
    • https://ralubimuxafoku.weebly.com/uploads/1/3/4/3/134373731/1069f5543d0fff9.pdfIn PDF document text
    • https://musazowoxagaw.weebly.com/uploads/1/3/4/3/134323980/dugifawojem-kujuxegefuzedad-rekul-wabozirosasag.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/xuxozodorozus_bulanafavita.pdfIn PDF document text
    • https://kowawixuru.weebly.com/uploads/1/3/4/5/134509215/7928262.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/ae1a19cd-2cce-4179-9ec2-4f089f63ce16/demofutakewopiranuguse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85062ab-883e-4cf4-a1e5-38a3407e13c8/33201052454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0307/4984/files/nafamesomovuwavug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f338569b-e5a5-4a99-b80c-447416e94e3e/18100163552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8dfe01a-ecee-46c2-908f-4da9a4f239fc/48641288894.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/repaso_capitulo_6_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc3742a-b231-4353-a0f9-3ad5622de45d/whatsapp_porn_group.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_off00005bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDC 3112 bytes
SHA-256: dee539210ddb35211bc4e961cf16a8b42a0e3e80a3d6e8518198cdfacaa04f95
font_01_sfnt_off000066fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FB 4900 bytes
SHA-256: 27cb84c129f6f1d639b0accd8644fe123d976893292777e2faa366197627f1c7
font_02_sfnt_off000077ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77BA 10744 bytes
SHA-256: a5161712cb23d57da4a34580bec43b16a722d2178edc27b3f2a0fee08f5fba9b

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