PDF malware analysis — malicious · 6ec729d967ce1f4c

MALICIOUS

PDF

44.8 KB Created: 2020-06-04 00:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f72a5af399c33c7ed8e42fe0b974d14e SHA-1: 310fecabe37c443feb6f056ea9c9a45782b4a88e SHA-256: 6ec729d967ce1f4ca843fd46540e5a0d7861f74ae1d28408e99c943713cdf784

104 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. The presence of a "download button" lure and the ML classifier flagging this PDF as malicious strongly suggest a phishing or spam campaign. The document's primary purpose appears to be to redirect users to these external links, likely to distribute further malicious content or engage in SEO spam.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://3ok.undesirable.us/uploads/1/3/0/4/130488851/130488851.html#baby+led+weaning+book
- http://mta-sts.mail.prettynpoised.com/uploads/1/3/0/4/130483767/zazedogivu.pdf
- http://waltonsviewfarm.com/uploads/1/3/0/3/130313243/pabupivafetu-wilupokikev-bazibuwuwaz.pdf
- http://americansouthernar.com/uploads/1/3/1/6/131607229/c9b2b607dd3c.pdf
- http://ritasbeautysupply.com/uploads/1/3/1/4/131408203/begegilu-gozazoxewijeseg-naneromar.pdf
- http://monnibella.com/uploads/1/3/0/5/130551445/6e648555152.pdf
- http://cinderellabanzon.com/uploads/1/3/0/7/130738629/b26fd0ff7e.pdf
- http://yml770.org/uploads/1/3/0/8/130874104/e72eeb4a4.pdf
- http://thriftsinthesticks.com/uploads/1/3/0/6/130639309/cddf81fbb.pdf
- http://3ok.undesirable.us/uploads/1/3/0/4/130488851/terms.html
- http://3ok.undesirable.us/uploads/1/3/0/4/130488851/dmca.html
- http://3ok.undesirable.us/uploads/1/3/0/4/130488851/policy.html
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://nedetepu.files.wordpress.com/2020/06/dabosuz.pdf
- https://dofidumiwugu.files.wordpress.com/2020/06/kureroxarenelod.pdf
- https://pamidabi.files.wordpress.com/2020/06/zomabetogefiwodewebefo.pdf
- https://lizipizeriwo.files.wordpress.com/2020/06/29906842833.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_off00008317.bin` `cf54c102e59d692ad7ec952a82c01c7cde7350773b547ec46d0e2a17907820ec`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8317	10900 bytes

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