Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6878ec0cf37c3e5…

MALICIOUS

PDF

61.7 KB Created: 2020-06-11 18:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 84d5cecab27cf1f5bc4ab86947171efd SHA-1: db10076a8cfd867d7a08200935b482ec5d6b82b5 SHA-256: f6878ec0cf37c3e5e76724e8a2c8304501fd978b8b65631466ea45e6ef7d1e43
116 Risk Score

Malware Insights

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

The PDF document impersonates a cloud service, a common lure for users to click embedded links. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which point to suspicious domains. The document body contains obfuscated text and references to PDF software, likely to appear legitimate. The primary attack vector is the embedded malicious URLs, designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://endlesshappiness.org/uploads/1/3/0/6/130639036/130639036.html#pdf+xchange+pro+3.6 PDF link annotation
    • http://electrobelle.be/uploads/1/3/0/5/130540266/ximiwefuposefa.pdfIn PDF document text
    • http://74-123-77-65.mgwnet.com/uploads/1/3/1/3/131384373/5400fcd14de5f.pdfIn PDF document text
    • http://creationcaresummit.org/uploads/1/3/1/3/131380126/jawuzasigo.pdfIn PDF document text
    • http://mail.weymedia.net/uploads/1/3/1/4/131452904/fosubinofoxafepamovo.pdfIn PDF document text
    • http://ibrafertil.com/uploads/1/3/1/4/131437633/rajabivumezad-sifokelin-guxenagegel-zexiguvu.pdfIn PDF document text
    • http://limbojewelryblog.com/uploads/1/3/0/3/130313241/2577532.pdfIn PDF document text
    • http://booking.myelegantmarriage.com/uploads/1/3/0/8/130874091/1692207.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kugomiregu812748447.files.wordpress.com/2020/06/fitujipu.pdfIn PDF document text
    • https://novodotowivo.files.wordpress.com/2020/06/870045559.pdfIn PDF document text
    • https://juvavapu.files.wordpress.com/2020/06/82306377609.pdfIn PDF document text
    • https://luperixul.files.wordpress.com/2020/06/18815551618.pdfIn PDF document text
    • https://zabipapubu336182313.files.wordpress.com/2020/06/4952508873.pdfIn PDF document text
    • https://guvewex.files.wordpress.com/2020/06/33829172600.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E3 10748 bytes
SHA-256: c32e89a5172f6da669aa0f22571c9ce9f3e59e636c65114bf1191c1c9fdb8bd3

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