PDF malware analysis — malicious · 0b542ad684aad1fd

MALICIOUS

PDF

34.0 KB Created: 2020-06-04 05:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 07d495474759d5a1c0674d0acbcb97d2 SHA-1: 83ae2f7da9a27b3188ddb604e676ea6103f49ac9 SHA-256: 0b542ad684aad1fd8ce2f3d09933695cd182ad222754f4c90c4578ba44f6f94b

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to potentially malicious content or for SEO abuse.

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://newjerseyhomebuyerseminar.com/uploads/1/3/0/3/130313053/130313053.html#shipping+up+to+boston+remix
- http://nourishhealthservices.com/uploads/1/3/0/7/130776027/pogibizazixugederiki.pdf
- http://imagingquest.net/uploads/1/3/0/7/130739502/revenimibow-pubixumazemamo-sazovomebemog-likivaxotuk.pdf
- http://taichispirit.net/uploads/1/3/0/4/130479513/jirotejafabo.pdf
- http://askbrotherjake.com/uploads/1/3/0/5/130540405/bawasidaka.pdf
- http://cabinetgauthiermallet.ca/uploads/1/3/0/4/130436020/jixenor-duxomawukowok-sulato-nivamupaferexum.pdf
- http://newjerseyhomebuyerseminar.com/uploads/1/3/0/3/130313053/terms.html
- http://newjerseyhomebuyerseminar.com/uploads/1/3/0/3/130313053/dmca.html
- http://newjerseyhomebuyerseminar.com/uploads/1/3/0/3/130313053/policy.html
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://jolibepal.files.wordpress.com/2020/06/36914632416.pdf
- https://kovuruboxa660899873.files.wordpress.com/2020/06/65419792717.pdf
- https://suvovep.files.wordpress.com/2020/06/muwefuwa.pdf
- https://majepako.files.wordpress.com/2020/06/39177063269.pdf
- https://bafarewibu502464578.files.wordpress.com/2020/06/feforugadesoxavi.pdf
- https://xivofupuva.files.wordpress.com/2020/06/wabekaruwatitomek.pdf
- https://vodefewosiru.files.wordpress.com/2020/06/dekajavuximo.pdf
- https://rusevaleno.files.wordpress.com/2020/06/fababuxuruzazapilo.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00005aa1.bin` `48127045b7f2e3897c0333e66ced83b3c1129dbd82fd048ca03e53bc5a62a340`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5AA1	9768 bytes

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