PDF malware analysis — malicious · cfb68f1e2f5f6c0f

MALICIOUS

PDF

67.6 KB Created: 2021-02-03 00:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02

MD5: 1947d398ffed27480e7c4912f97488d2 SHA-1: 2e58efe54775dbae59e64c1d291615a7a66cefff SHA-256: cfb68f1e2f5f6c0fa0a7bc410dd0589eda5738708c542c7848b729ceccb19dae

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the conclusion that this document is part of a link farm designed to distribute malware or conduct phishing campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9622

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
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://maypoin.ru/aws?utm_term=bluestacks+mac+10.+7.+5 PDF link annotation
- http://ericksandoval.com/43662923995ovxoy.pdfIn PDF document text
- http://tanuwoxomasosog.22web.org/63385937834.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420927/normal_5fd2eff22beaf.pdfIn PDF document text
- http://seomagnat1.online/vekojavewimevovae7ybt.pdfIn PDF document text
- http://faceit.su/critical_thinking_12th_edition_downloadewtja.pdfIn PDF document text
- http://experiment.website/joe_dispenza_books_breaking_the_habito5iae.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387928/normal_5fee7e2634ce1.pdfIn PDF document text
- http://0fruits.space/assassin_creed_revelation_bug_graphiquenzdre.pdfIn PDF document text
- http://pumba-timon.space/spongebob_sponge_on_the_run_full_movie4j4mq.pdfIn PDF document text
- http://vizionsmc.net/league_of_legends_mod_apk_android_1azvhh.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4454056/normal_5ff901fa6c001.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387242/normal_5fdbcce99f2db.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://posugez.epizy.com/baixar_jogos_android_de_futebol.pdfIn PDF document text
- http://dalizavok.rf.gd/chammak_challo_video_hd_song.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000da63.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA63	5008 bytes
SHA-256: `fdecee2f7a2bed0f2347029c7b9daa07444a35bebe461d09de738a2dfeace6b8`
`font_01_sfnt_off0000eb8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB8F	10632 bytes
SHA-256: `d2d44bf7fde762460110b9ba5409f2d36f31f2423d157c7deecb79b704445ec3`

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