Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b1b080bbec9733…

MALICIOUS

PDF

78.7 KB Created: 2020-03-13 08:07:26 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 171f001ee489d850c778e40063be2c25 SHA-1: 90a2f30bbce3023721ff145c8d1c565a35b4b20a SHA-256: 62b1b080bbec9733e8057dba3ca458b1e42d7cd36d1b51707423b6c9683ddfa2
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search results or distribute further malware. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous URLs and the PDF structure itself points towards a tactic often used in phishing or SEO poisoning campaigns.

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://x0451290xstreamtravel.xsideas.com/uploads/1/3/0/9/130969800/130969800.html#ecological+footprint+wwf+report
    • http://www.crustaman.com/uploads/1/3/0/6/130639554/jiviwaw.pdf
    • http://www.reddoortaneytown.com/uploads/1/3/0/6/130604919/35a83d.pdf
    • http://modyjiller.com/uploads/1/3/0/2/130289551/fawasizafuja-pikagumaxibel-wixofaforilunu-lodiwaxutu.pdf
    • http://horatiokemeny.com/uploads/1/3/0/8/130813427/5682328.pdf
    • http://auburn-ventures.com/uploads/1/3/0/4/130488542/82dcbff16.pdf
    • http://atrfootwear.com/uploads/1/3/0/6/130604785/defobanujof.pdf
    • http://74-123-73-176.mgwnet.com/uploads/1/3/0/5/130546574/80093a2f0173669.pdf
    • http://comfortablechristianity.com/uploads/1/3/0/5/130551524/gokavomovenujex-zukikesinamimuj-jajogejadumugat-dukulivovusik.pdf
    • http://zingoapps.com/uploads/1/3/0/5/130589033/425c70.pdf
    • http://kryanjenkins.shop/uploads/1/3/0/4/130436094/1375184.pdf
    • http://www.e-stringer.com/uploads/1/3/0/7/130775388/aa56c4aa01.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://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e68a.bin
b1a10308c7b2aef28fa2b6cf99581718a77cf42bf2a7d8e830d644fedda6d3c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE68A 9412 bytes
font_01_sfnt_off00010951.bin
b64d6741cfec0aad0865d017b05e0e1fb7b4a6100249b802a3843c97d8d05181
pdf-font-stream PDF embedded font (sfnt) at offset 0x10951 4552 bytes
font_02_sfnt_off000117e6.bin
634897ac177178be17eee8f18901e5a7b554e26e202241b45de7dc89f2c5e4a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x117E6 16072 bytes