Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc39953ad4b44e1…

MALICIOUS

PDF

36.3 KB Created: 2020-06-04 14:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8eb0a95c257367ad8775a731793e6dd1 SHA-1: aadd962b1862e0e7a2a4f9effae64ef07ee5a66b SHA-256: 5dc39953ad4b44e156de16e158b01f67a4deb93c958c9aa09623cef426ae3945
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to a vast array of external websites, likely for SEO spam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://paradisejetskirentals305.com/uploads/1/3/2/3/132303116/132303116.html#ark+boss+stats
    • http://crystalblue.org/uploads/1/3/0/3/130379266/kagupowutikix.pdf
    • http://goldstarcleaningfirst.com/uploads/1/3/0/6/130621952/tojajesa.pdf
    • http://niedernation.com/uploads/1/3/0/8/130874224/6966697.pdf
    • http://grunt365.com/uploads/1/3/0/5/130546880/2583572.pdf
    • http://claireqyang.com/uploads/1/3/0/7/130738792/abeacc064.pdf
    • http://cbkcreationsbyklaus.com/uploads/1/3/0/7/130776101/tizejojejujuguxov.pdf
    • http://kasecorstanje.com/uploads/1/3/0/4/130488223/rimimubofokote.pdf
    • http://crystalfrancis.voyagerwebsites.com/uploads/1/3/0/7/130739396/f53d8c8fdfc1f9.pdf
    • http://zankpos.com/uploads/1/3/1/4/131482988/deguje-nunojexukador-tofor.pdf
    • http://paradisejetskirentals305.com/uploads/1/3/2/3/132303116/terms.html
    • http://paradisejetskirentals305.com/uploads/1/3/2/3/132303116/dmca.html
    • http://paradisejetskirentals305.com/uploads/1/3/2/3/132303116/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://laxanob.files.wordpress.com/2020/06/63071697788.pdf
    • https://kofimefek.files.wordpress.com/2020/06/kipovusug.pdf
    • https://judirowekeva.files.wordpress.com/2020/06/9415075601.pdf
    • https://pixapivuba.files.wordpress.com/2020/06/27236168191.pdf
    • https://divasojawi.files.wordpress.com/2020/06/bufemakoxozidedotub.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_off000061f6.bin
7b6e6bb8a43cb8428ae3bd02b3d02f4005dd109087589455c417c6cd5c6d3be9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F6 10588 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.