PDF malware analysis — malicious · 110aa98f34c36394

MALICIOUS

PDF

34.7 KB Created: 2020-05-18 06:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d19a87e63f630a167550fdbe40e6fc2c SHA-1: 30f5b8dc81829dc3d0f07a013c866ec13db3d5e2 SHA-256: 110aa98f34c363947d8d86e0ccd00b8b1983429d37c9ecfdc201ed69843e2c3d

136 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to obscure malicious activity. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The embedded URLs are likely part of this lure, directing users to potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://goodgroundfx.com/uploads/1/3/0/5/130551656/130551656.html#cake+mania+game++for+pc
- http://metaggregate.com/uploads/1/3/0/5/130540214/fuvalusukisavulez.pdf
- http://presencegrp.com/uploads/1/3/0/4/130490915/wewug.pdf
- http://inthefoldsbooks.com/uploads/1/3/0/5/130551055/4126636.pdf
- http://deshnasirkar.com/uploads/1/3/1/4/131453274/560125.pdf
- http://ieatdinosaurs.com/uploads/1/3/0/2/130273801/1119036.pdf
- http://tempecollisions.club/uploads/1/3/1/4/131453393/01b501b27cc3d.pdf
- http://ameribotinc.com/uploads/1/3/0/4/130435787/8124761.pdf
- http://carnarvonautoelectrics.com/uploads/1/3/0/7/130776458/piromimudunujowi.pdf
- http://trinityenergycenter.com/uploads/1/3/0/4/130478433/e880b997775c0f0.pdf
- http://lubbockplumbingservice.com/uploads/1/3/0/5/130588153/84d9cf.pdf
- http://masonfarmersmarket.net/uploads/1/3/1/6/131636587/nopidijemulapatuge.pdf
- http://rusticcoatracks.com/uploads/1/3/0/9/130969483/5393128.pdf
- http://georgiesgiftwrap.com/uploads/1/3/0/4/130483629/zexegukujalujikil.pdf
- http://robotitechnologies.com/uploads/1/3/0/5/130543453/fb89ced3.pdf
- http://hosemonkey.net/uploads/1/3/0/3/130379740/b52de631776c8.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- 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_off00005a6d.bin` `53394a4a99bd41bb094d54f0665ca9a8ffa39043faf440f696bb47071bd0b569`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A6D	10872 bytes

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