Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2d2f21dfdc2dfd…

MALICIOUS

PDF

50.8 KB Created: 2020-10-04 21:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c714e38be1f55ed86d31403c2abaea2b SHA-1: a5a9b55e83248ac5238371aaf6e4dacefa4b5b90 SHA-256: 9d2d2f21dfdc2dfd58d2d1adb00674d962414bcf2b74a409ab078c02f9e9443b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by an ML classifier and contains links to known malicious redirector infrastructure. The document also utilizes disposable hosting, suggesting an attempt to obscure the ultimate destination of the links. The primary attack pattern involves directing users to external malicious content.

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://ggtraff.ru/pify?keyword=abcs+of+death+2.5+%25282016%2529 In PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/27211433922.pdfIn PDF document text
    • https://site-1037265.mozfiles.com/files/1037265/nimodidor.pdfIn PDF document text
    • https://site-1039207.mozfiles.com/files/1039207/90684284400.pdfIn PDF document text
    • https://site-1037905.mozfiles.com/files/1037905/vobadiponumegitekan.pdfIn PDF document text
    • http://files.stpaulcumberland.org/uploads/1/3/1/3/131398313/puwizafivimadavup.pdfIn PDF document text
    • http://files.thirstforknowledge.ca/uploads/1/3/1/4/131454165/546b8aac864477.pdfIn PDF document text
    • http://lajujogob.nyacuchiro.com/uploads/1/3/2/3/132303382/314c91.pdfIn PDF document text
    • http://giwedod.laocdb.com/uploads/1/3/1/4/131482916/jagewomum.pdfIn PDF document text
    • http://wureti.iahaschools.com/uploads/1/3/2/7/132740214/486ccdb31cc3e4.pdfIn PDF document text
    • http://files.breezyboxers.com/uploads/1/3/0/7/130739971/musulaxegarifup-duxixor-bolifasulox-nalikobotel.pdfIn PDF document text
    • http://files.sugarhillumctexarkana.com/uploads/1/3/0/8/130813821/f48d9.pdfIn PDF document text
    • http://zanuzaj.oceanetic.com/uploads/1/3/2/6/132681072/b1cc1a21919.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a346.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA346 17720 bytes
SHA-256: 1430b78f1e1f37c8b4041ff885c0a943264405b211ff7d21874ce4e0df2a5f49
font_00_sfnt_off00006c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C17 5900 bytes
SHA-256: 6c0095f26385764c2047a0351a98d23097ad5095e949a530a64eb2e1d842518c
font_01_sfnt_off0000804e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804E 10140 bytes
SHA-256: 848c7653fb63b9d82278cc2fd3036212f6e08d1d02e111f3261b5dab1b6b55cd

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