PDF malware analysis — malicious · b3c8a88f4aeef6d8

MALICIOUS

PDF

66.6 KB Created: 2021-01-26 16:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 93906e2256e8285500b626f51cf2d6a5 SHA-1: d055d802d161901b03c4bc8fead8d48a930722d1 SHA-256: b3c8a88f4aeef6d8af220df93c8d58c89ab23ef93739d19c2360773bbb5f2d8d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm or SEO spam, containing a large number of external links to other PDF documents. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to distribute further malware or engage in phishing. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites or download further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.8630

Heuristics 4

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://trafffi.ru/aws?utm_term=alchemy+wow+vanilla+guide PDF link annotation
- https://cdn.sqhk.co/sixepatexup/fuSLvhg/27258718226.pdfIn PDF document text
- https://cdn.sqhk.co/pufowuvikij/hi8Lhev/zombie_killer_shotgun_rounds.pdfIn PDF document text
- https://cdn.sqhk.co/lewuravasu/FSjfigA/hit_the_roof_speed_gang_traduction_francais.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402712/normal_5fda17892fa32.pdfIn PDF document text
- https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/6769677.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4409628/normal_5fefbf14245d0.pdfIn PDF document text
- https://cdn.sqhk.co/jolodovi/Khc3ih8/8809337205.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464863/normal_5fd2559e23844.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366321/normal_5fe0eec56f933.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4416140/normal_5fccaaa651fdb.pdfIn PDF document text
- https://cdn.sqhk.co/fudamozomeb/iigimRY/story_saver_wa_untuk_iphone.pdfIn PDF document text
- https://cdn.sqhk.co/zirixegip/eNieKjg/46890962376.pdfIn PDF document text
- https://cdn.sqhk.co/pabelewexo/e9r9Zij/kanakepapadeniwofifugiko.pdfIn PDF document text
- https://cdn.sqhk.co/gupimupiset/K3T0nie/7789387137.pdfIn PDF document text
- https://cdn.sqhk.co/diwewiduvaz/hdEzMXD/14398499370.pdfIn PDF document text
- https://cdn.sqhk.co/surixirulol/NTHgf8C/guide_for_lifeafter_survivors.pdfIn PDF document text
- https://cdn.sqhk.co/vuritukupus/thbjh1m/26291247040.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e358.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE358	5324 bytes
SHA-256: `b89ffbbd2effa85808684d9cc7b039d79dd85692623e970da27d40882b78aeab`

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