PDF malware analysis — malicious · 3e8d9a8e724da175

MALICIOUS

PDF

72.5 KB Created: 2021-01-01 14:31:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 24e3985a224a91a530bbbdfd1009f29f SHA-1: 1fcfd29af8321877cc664eb9fec8f27e8761daac SHA-256: 3e8d9a8e724da175bd7dc0290e53fe071e81280e7487effe8de712937f3e046a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. One of the embedded URLs, 'https://traffine.ru/aws?utm_term=realityhigh+imdb+parents+guide', appears to be part of this scheme. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', further supporting its malicious nature. The presence of embedded URLs and the overall structure point towards a phishing or malicious redirection attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

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.
ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 https://traffine.ru/aws?utm_term=realityhigh+imdb+parents+guide
- https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/1455332.pdf
- https://cdn.sqhk.co/takularozo/ighgidE/naxijebugurinotabupabap.pdf
- https://cdn.sqhk.co/kalijada/LZgfjcD/mewe_app_reviews.pdf
- https://zufugorutamivas.weebly.com/uploads/1/3/4/4/134401118/c62eba4643.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/mupukesunobaga/bodybuilding_exercise_video_free.pdf
- https://s3.amazonaws.com/kevava/niwanubu.pdf
- https://s3.amazonaws.com/dibedamoka/la_luz_mala.pdf
- https://s3.amazonaws.com/wibadinavosunom/checkpoint_ccsa_cbt_nuggets.pdf
- https://s3.amazonaws.com/jadere/98936077815.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cdea.bin` `0561d3321b399905c61657a414e85114722b6719dbed814a23c43a9ca082e9b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDEA	5620 bytes
`font_01_sfnt_off0000e0d7.bin` `2432c62dfd869c7dc474df040fec10373d33dbc0ff586a8f6c12f8249fc25f98`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0D7	3516 bytes
`font_02_sfnt_off0000ee7e.bin` `64ca6f7a65a5dc85734c32d80e7639286e396046dbf39ded844daa7e1da029c1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE7E	11212 bytes

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