Malicious PDF — malware analysis report

Static analysis result for SHA-256 8deb603471fe05df…

MALICIOUS

PDF

71.5 KB Created: 2020-03-29 13:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: cf02fadeb3ea3649b95c6c486fb7b65f SHA-1: 0470e04876b25e7fb10262a606995c8a2fa5a8ab SHA-256: 8deb603471fe05dffbe2fc303454daca98e4c89686609dee4084e6646c62f90f
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. The primary URL, http://74-123-75-235.mgwnet.com/uploads/1/3/1/4/131406453/131406453.html#conclusion+de+movimiento+en+una+y+dos+dimensiones, is also present in the document body. This suggests a campaign to drive traffic to potentially malicious or phishing sites, likely distributed as a spearphishing attachment.

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://74-123-75-235.mgwnet.com/uploads/1/3/1/4/131406453/131406453.html#conclusion+de+movimiento+en+una+y+dos+dimensiones PDF link annotation
    • http://tinytownllc.com/uploads/1/3/0/8/130814921/rufemabupor.pdfIn PDF document text
    • http://tessalynfarrell.com/uploads/1/3/0/4/130476539/fd4dc593f25fd.pdfIn PDF document text
    • http://realjamesriley.com/uploads/1/3/0/7/130776032/7547162.pdfIn PDF document text
    • http://miamipropertyclaim.com/uploads/1/3/0/7/130776122/5d949.pdfIn PDF document text
    • http://readingsbykata.com/uploads/1/3/0/5/130589354/mekolawaturun.pdfIn PDF document text
    • http://burlingtonrenos.com/uploads/1/3/0/4/130488631/mamixo_golesataxotiziw_malijezaxi_nopugonejin.pdfIn PDF document text
    • http://rijkewijnen.nl/uploads/1/3/1/1/131163494/6955677.pdfIn PDF document text
    • http://givewreathsachance.com/uploads/1/3/0/2/130273625/kuvegomunu.pdfIn PDF document text
    • http://expressrelocators.com/uploads/1/3/0/6/130620564/1854679.pdfIn PDF document text
    • http://unioneast.net/uploads/1/3/0/2/130272606/f5adb62cb.pdfIn PDF document text
    • http://martinezseafood.net/uploads/1/3/0/7/130775451/a3e1a14a6e4395.pdfIn PDF document text
    • http://somethingblueresale.com/uploads/1/3/0/9/130969368/gurogo-lobijojalig-waseredig-rakalabi.pdfIn PDF document text
    • http://tarjetaspostalesymasbakerstore.com/uploads/1/3/0/6/130603847/8608639.pdfIn PDF document text
    • http://keepinitfrosty.com/uploads/1/3/0/7/130738971/c5c9b2b649.pdfIn PDF document text
    • http://leverage-smart.com/uploads/1/3/0/4/130489229/votisuwe.pdfIn PDF document text
    • http://sadieco.com/uploads/1/3/0/4/130435516/fududavugila.pdfIn PDF document text
    • http://teambuckmetropolitan.com/uploads/1/3/0/5/130539660/pipire-tozotezelulus.pdfIn PDF document text
    • http://hospicehearts.org/uploads/1/3/0/2/130272571/kajaziditadugaxuxoxo.pdfIn PDF document text
    • http://freedomfit121.com/uploads/1/3/1/1/131164199/834389.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC970 1588 bytes
SHA-256: 7d0e4f26927737c593ed7efda103a1107150fe3ac8ddbcafaf6ee6c0af50a0b0
font_01_sfnt_off0000d126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD126 11224 bytes
SHA-256: db63c80ee46e1cda12ffe4ee0d54cee30614aaf6499bdebe626225f98516dd6b
font_02_sfnt_off0000f868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63