PDF malware analysis — malicious · ea0f9a9f04425fa2

MALICIOUS

PDF

84.3 KB Created: 2021-03-25 03:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ff27c149180d837a73ffb916ba1593fa SHA-1: d444a0e0d14bf73edc956795cf9aba05da2ba41e SHA-256: ea0f9a9f04425fa201e6df7e4f5de91f462bfe9fed3d56e075b10394d1d6039f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic firing indicating a link farm with numerous external PDF links, one of which is a suspicious URL. ClamAV also detected the file as Pdf.Phishing.Trojan. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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.
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://fokemale.ru/wix?keyword=fresh+air+by+ecoquest+parts
- https://static.s123-cdn-static.com/uploads/4473916/normal_5ff7a75d1a5c3.pdf
- https://cdn-cms.f-static.net/uploads/4453902/normal_60275a8d83ed9.pdf
- http://milansit.space/11793772954fm5p.pdf
- https://cdn.sqhk.co/silutoge/lSTihia/deginogavo.pdf
- https://cdn.sqhk.co/revinoxu/he91ife/word_charm_cheats.pdf
- https://cdn-cms.f-static.net/uploads/4377120/normal_603e7aabe82a1.pdf
- http://oblakova.ru/fudokuxdlzet.pdf
- http://instgramcopyrightdispute.com/robin_hood_2018_cast_namezy6xn.pdf
- https://cdn-cms.f-static.net/uploads/4455890/normal_6015afd2a1441.pdf
- http://zuvels.xyz/ndis_consumables_guide_2019aw630.pdf
- https://rixukiwifezi.weebly.com/uploads/1/3/5/3/135392959/9b7d2.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/dejazuvorira/kannada_feeling_video_songs_mp4.pdf
- https://s3.amazonaws.com/jezekemunidup/vuratiwevox.pdf
- https://s3.amazonaws.com/zopenave/79785011241.pdf
- https://s3.amazonaws.com/widofafane/fufarixagovaxuv.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010b1e.bin` `abdd58a7af159e4c2415123ba952b3c3233f43f631c9ec587296e05408dc10a3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B1E	5312 bytes
`font_01_sfnt_off00011d31.bin` `382eadf8da624b58651ee1eb716b0323a6110972285fa8d8c22937b814f8cb45`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D31	11456 bytes

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