PDF malware analysis — malicious · 874bde3d5d53bb40

MALICIOUS

PDF

76.3 KB Created: 2021-04-01 00:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 42452f49f3b350299ea4e1e14fd13f60 SHA-1: ae66c078f5c344e40a8f89a0c4bcb050c86453c8 SHA-256: 874bde3d5d53bb40fc97ed861445114c0e8bd438db2ab806cf73845294296c53

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9802

Heuristics 4

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
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://bologen.ru/award?keyword=caracteristicas+del+escepticismo+pdf
- https://lifusapemar.weebly.com/uploads/1/3/4/5/134526201/bad932.pdf
- https://cdn-cms.f-static.net/uploads/4423700/normal_6057eb8d72cb0.pdf
- https://jokikisiva.weebly.com/uploads/1/3/0/8/130873994/pojudasov_rixasosogosun_mukunenevebisod.pdf
- https://tenojamerefu.weebly.com/uploads/1/3/1/8/131857247/5893951.pdf
- https://dutaveporope.weebly.com/uploads/1/3/4/6/134600224/41a8b32d46a06.pdf
- https://rudumareta.weebly.com/uploads/1/3/1/8/131871695/vafupebevare_fibika_vimofibeluru.pdf
- https://static.s123-cdn-static.com/uploads/4410015/normal_5fe019f13b5dc.pdf
- https://bifixebuwo.weebly.com/uploads/1/3/0/7/130776276/2185609.pdf
- https://tupusedaluniji.weebly.com/uploads/1/3/0/7/130738871/9767559.pdf
- https://cdn.sqhk.co/sategexarom/hggjdjb/80176020663.pdf
- https://cdn.sqhk.co/noviraxat/bheicWf/68693240118.pdf
- https://jerewerek.weebly.com/uploads/1/3/5/3/135349205/7110148.pdf
- https://cdn-cms.f-static.net/uploads/4412761/normal_60185bb7c7a9f.pdf
- https://cdn.sqhk.co/lamiwifa/ihhbxjf/spirit_animals_meanings_goat.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://5862e4ea-63a6-4c92-af93-e06d02d1a664.filesusr.com/ugd/eaa371_f52f19a3bcad48f2adfdd86ade3feee5.pdf?index=true
- https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_73d80eb91faf4ec1acc0bb8972143dad.pdf?index=true
- https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_54b4203e582444249a79e5a294e1ac1a.pdf?index=true
- https://2e4b0ed6-c237-476e-b23b-7c95f147629f.filesusr.com/ugd/30e930_efbe4b4ca9f44bcfb4526c687d374f40.pdf?index=true
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fd3c.bin` `93c16332d703e307fc15c73b3ebf1dcd2305f772d05b8190f79c7fd0a31674f1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD3C	5208 bytes
`font_01_sfnt_off00010ed6.bin` `73302797577ba14bde8b8423716458363312862ac8d9c40c902aab06369b1a02`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10ED6	12448 bytes

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