Malicious PDF — malware analysis report

Static analysis result for SHA-256 7224ff6fdce6a85e…

MALICIOUS

PDF

38.4 KB Created: 2020-06-04 16:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b481639d308c04741a0e2a959c5ca27d SHA-1: 5633458154a43fa668e8dfa3d3dafa71ef4b45ab SHA-256: 7224ff6fdce6a85effcb05d7b02a58ccc5d1187fe49e5b0c4dcb8beef137cab9
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external websites, many of which are structured as link farms. The document body, though heavily obfuscated, contains references to a manual and URLs, suggesting a lure to external content. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a large number of external links, typical of phishing or malware distribution schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://74-123-75-191.mgwnet.com/uploads/1/3/0/4/130476649/130476649.html#york+diamond+80+manual
    • http://durhamrenivations.com/uploads/1/3/0/7/130739856/fa165b1f.pdf
    • http://miller-senior-po-1.rominastiebenphotography.com/uploads/1/3/0/8/130813897/lexuworab.pdf
    • http://tallyho-barkway.co.uk/uploads/1/3/0/6/130604758/7213708.pdf
    • http://drrosechildcentredcounselling.com/uploads/1/3/0/2/130289410/gexesaxim.pdf
    • http://cprratemate.com/uploads/1/3/0/5/130588625/c195df4dc124fc.pdf
    • http://apricklypair.org/uploads/1/3/0/6/130604229/9497234.pdf
    • http://74-123-73-82.mgwnet.com/uploads/1/3/0/9/130969705/312508.pdf
    • http://hostmaster.d-i-g.de/uploads/1/3/0/6/130621426/sarabivekevewutifi.pdf
    • http://74-123-75-191.mgwnet.com/uploads/1/3/0/4/130476649/terms.html
    • http://74-123-75-191.mgwnet.com/uploads/1/3/0/4/130476649/dmca.html
    • http://74-123-75-191.mgwnet.com/uploads/1/3/0/4/130476649/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://togifiviliv.files.wordpress.com/2020/06/51030802569.pdf
    • https://xivivisep.files.wordpress.com/2020/06/japupidimik.pdf
    • https://fukoboseniki.files.wordpress.com/2020/06/41905875251.pdf
    • https://pewusofoj.files.wordpress.com/2020/06/garowet.pdf
    • https://dazemafabuse.files.wordpress.com/2020/06/97475542690.pdf
    • https://xomolabotev.files.wordpress.com/2020/06/36375284991.pdf
    • https://zezupid.files.wordpress.com/2020/06/lebusuguboxu.pdf
    • https://leramut.files.wordpress.com/2020/06/garalugofiva.pdf
    • https://nigurite622001163.files.wordpress.com/2020/06/16212965487.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a3b.bin
753ba58924223d0969534e8a99472158794ecb759e437bebe9be9b05fc7342e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3B 10328 bytes