Malicious PDF — malware analysis report

Static analysis result for SHA-256 616960fda357ca5a…

MALICIOUS

PDF

48.3 KB Created: 2020-06-12 14:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 169afdfcf1d9c5deb84685e6357d52cd SHA-1: 5f0306ff1453d1f5cd7026a849d45fd399332dcb SHA-256: 616960fda357ca5aba4154d980513071eb1582c1544477eab41bf5ffc911dee6
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, also contains URLs that point to external domains. These links are likely intended to redirect users to malicious websites for phishing or to distribute further malware. No scripts were extracted, but the presence of numerous external links suggests a malicious intent to redirect the user.

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://loveit-defaultspanish.devsite-1.com/uploads/1/3/0/5/130590133/130590133.html#energie+d%2527+ionisation+exercice+corrig%25C3%25A9
    • http://rdawson.generatingsolutions.net/uploads/1/3/0/8/130874333/a201b.pdf
    • http://reelectrandywilliams.com/uploads/1/3/1/3/131383548/rotawixidis_niromok_zupisewa_gobexo.pdf
    • http://qualityhealthwellnesssuplies.com/uploads/1/3/0/6/130620467/124315.pdf
    • http://ishopssb.com/uploads/1/3/2/3/132303041/wasefapubox_vukafosi.pdf
    • http://buckscountychorus.com/uploads/1/3/0/9/130969504/vadit.pdf
    • http://moncadas.net/uploads/1/3/1/4/131437637/5431a.pdf
    • http://misfit-world.com/uploads/1/3/1/4/131438127/7914732.pdf
    • http://24kttravel.agency/uploads/1/3/0/7/130776589/50e210da.pdf
    • http://royalvacationtravel.voyagerwebsites.com/uploads/1/3/1/4/131437578/lewovukimarumolo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://felaweve.files.wordpress.com/2020/06/50940909324.pdf
    • https://gavewune901380018.files.wordpress.com/2020/06/vesaminemu.pdf
    • https://naxopovo.files.wordpress.com/2020/06/96508906270.pdf
    • https://vixupidiva.files.wordpress.com/2020/06/53929250321.pdf
    • https://luperixul.files.wordpress.com/2020/06/fezotanexufonulizubar.pdf
    • https://negowonot.files.wordpress.com/2020/06/90328158615.pdf
    • https://kogovabazoro.files.wordpress.com/2020/06/bupijimumerowijag.pdf
    • https://jefimebatagi.files.wordpress.com/2020/06/32816894240.pdf
    • https://morizifu.files.wordpress.com/2020/06/41820845109.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_off000089db.bin
9e077e653448e81f4e085dea448bf22805467ebe8af18673beab6fed0da41118
pdf-font-stream PDF embedded font (sfnt) at offset 0x89DB 12872 bytes