PDF malware analysis — malicious · 991aa9a953666e50

MALICIOUS

PDF

67.6 KB Created: 2021-01-09 23:18:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: a8c46e1746f718b41f612458821cde88 SHA-1: b2b561adfa675334ce1e31d8c189bb1bc0261979 SHA-256: 991aa9a953666e50ffec36386d67b4bc67bb53662e6eb89cb82c2ac8ef894522

212 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves luring users to external sites via these links, likely for phishing or to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.8239

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://ggtraff.ru/aws?utm_term=gy-+30+light+sensor+datasheet In PDF document text
- https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/e947ae1d.pdfIn PDF document text
- https://cdn.sqhk.co/fujalapevame/igt7gfA/blaze_of_battle_hack_2019.pdfIn PDF document text
- https://cdn.sqhk.co/vinusubat/YC1lMGS/making_wood_joints_with_router.pdfIn PDF document text
- https://cdn.sqhk.co/faxenukev/wjcShcp/13205856039.pdfIn PDF document text
- https://cdn.sqhk.co/noruwotil/ibdSxia/diwawomukuwidewet.pdfIn PDF document text
- https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/voxexinelosiremejas.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/gedimuta/bolunax.pdfIn PDF document text
- https://s3.amazonaws.com/wujapu/important_full_forms_a_to_z.pdfIn PDF document text
- https://s3.amazonaws.com/bomupi/capsim_situational_analysis_answers.pdfIn PDF document text
- https://s3.amazonaws.com/libusamagowuvo/2098367077.pdfIn PDF document text
- https://s3.amazonaws.com/zalomi/bristol_stool_form_scale_diarrhea.pdfIn PDF document text
- https://s3.amazonaws.com/kuxuxemu/32401800710.pdfIn PDF document text
- https://s3.amazonaws.com/pirofopafu/asia_countries_and_capitals_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/jamuluvuvava/27461584665.pdfIn PDF document text
- https://s3.amazonaws.com/gavobawum/27142357963.pdfIn PDF document text
- https://s3.amazonaws.com/werowibovezoje/18884662560.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e4c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4C9	5556 bytes
SHA-256: `884341f429dc0e0ba2ae0613993b614c5b8b203b71d2f25ef12ec0e9a39b063c`

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