Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d6585f8c48b92d…

MALICIOUS

PDF

38.7 KB Created: 2020-04-18 05:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d3c3a0c6eff2e85195eef11f9b9423bd SHA-1: 06eb00779d3b92f66cddc0692c10b4a1168f945d SHA-256: 15d6585f8c48b92dcf4704d1bc1377488e31b15805b180f6834360f6bf5c7c78
96 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO link farms. The document body, though partially corrupted, contains a reference to "New whatsapp status malayalam" and a URL that appears to be the primary lure. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm, suggesting a campaign to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://homestagingprofessionaltraining.com/uploads/1/3/0/7/130775540/130775540.html#new+whatsapp+status+malayalam
    • http://yourhoopsnow.com/uploads/1/3/0/6/130620674/nupitegi.pdf
    • http://5047lankershim.com/uploads/1/3/0/7/130776085/balavafutol.pdf
    • http://darleys.me/uploads/1/3/0/7/130776167/0d1c9bc45c.pdf
    • http://normbrowntimberwoodpark.com/uploads/1/3/1/4/131437584/2329285.pdf
    • http://surf1unit.factorpositivo.com/uploads/1/3/0/7/130775378/zojulejavigewage.pdf
    • http://anilpatrickpatel.com/uploads/1/3/0/3/130313027/8789523.pdf
    • https://statusvideosong.net/wp-content/uploads/2019/02/malayalam_whatsapp_status_videos
    • https://statusvideosong.net/wp-content/uploads/2019/02/malayalam_whatsapp_status_videos_love
    • https://statusvideosong.mp4
    • https://statusvideosong
    • https://statusvideosong.net/wp-content/uploads/2019/02/Malayalam_whatsapp_status_love_malayalam_whatsapp_status_romantic
    • https://statusvideosong.net/wp-content/uploads/2019/02/new-malayalam-whatsapp-status-videos-6.net/wp-content/uploads/2019/02/new-malayalam-whatsapp-status-videos-4
    • https://statusvideosong.net/wp-content/uploads/2019/02/new-malayalam-whatsapp-
    • https://statusvideosong.net/wp-content/uploads/2019/02/whatsapp_status_malayalam_whatsapp_status_love_malayalam_whatsapp_status360p
    • https://statusvideosong.net/wp-content/uploads/2019/02/new-malayalam-whatsapp-status-videos-2.net/wp-content/uploads/2019/02/WhatsApp_status__Ishq__Status_video_Malayalam.mp4
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bad.bin
b65690feddfb8cb8618b7d8ed438a9f19098b8908668c7d885e9f276c52042e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAD 7660 bytes
font_01_sfnt_off00007995.bin
667a33df7c9e52f165f3e60ff71eb391fc86bca77a1f35e0ac0215f7b07e6997
pdf-font-stream PDF embedded font (sfnt) at offset 0x7995 16148 bytes