PDF malware analysis — malicious · c406ad4d95df148e

MALICIOUS

PDF

100.5 KB Created: 2021-04-04 13:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: b2339ec41c3b3f15ebd82baf0da5f06b SHA-1: e130801784e405094452c317326a891a30ea3fad SHA-256: c406ad4d95df148e0c314611ef12ba012988de543a8fb47a1cb35859d1cf633a

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with many pointing to Weebly-hosted PDF files, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution attempt via embedded links.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

Heuristics 6

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 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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://jumiwimov.ru/wix?keyword=nyan+cat+fly+unblocked PDF link annotation
- https://bajorenurelop.weebly.com/uploads/1/3/0/7/130739037/serikobu.pdfIn PDF document text
- https://zegesunipatobas.weebly.com/uploads/1/3/1/3/131379774/xoxarabijuboxazawuwi.pdfIn PDF document text
- https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/7a2f5a4d9eb2fc.pdfIn PDF document text
- https://totakolexab.weebly.com/uploads/1/3/5/3/135391630/3068700.pdfIn PDF document text
- https://cdn.sqhk.co/sotisajen/Wiaivif/lucky_plinko_big_win.pdfIn PDF document text
- https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/227b65de7fa0.pdfIn PDF document text
- http://wegoluxetas.scienceontheweb.net/sezixi.pdfIn PDF document text
- https://cdn.sqhk.co/nalawanuxa/4gdvHhj/piano_ladybug_noir.pdfIn PDF document text
- http://jenewazajasazu.getenjoyment.net/applied_auditing_book.pdfIn PDF document text
- https://cdn.sqhk.co/fapewejav/18MjKX9/million_lords_kingdom_conquest_strategy_war_mmorpg.pdfIn PDF document text
- https://solezoxi.weebly.com/uploads/1/3/4/6/134654925/penuwese.pdfIn PDF document text
- https://sepuvomaxobaba.weebly.com/uploads/1/3/5/3/135311468/jefudubadarolox_fupamigoz_ligix_jalum.pdfIn PDF document text
- https://riwewupurudo.weebly.com/uploads/1/3/1/3/131381540/49220.pdfIn PDF document text
- https://zagozejidenadap.weebly.com/uploads/1/3/1/4/131407028/wumagul-retik.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/bodajaku/geboxegegigiwimugikir.pdfIn PDF document text
- https://s3.amazonaws.com/sugosubexez/weight_training_planner_template.pdfIn PDF document text
- https://s3.amazonaws.com/lezerawe/25153749900.pdfIn PDF document text
- https://s3.amazonaws.com/nemafu/22668736656.pdfIn PDF document text
- https://s3.amazonaws.com/timeziso/sat_subject_test_dates_2022.pdfIn PDF document text
- http://gozenabuzixi.onlinewebshop.net/head_first_spring_framework_download.pdfIn PDF document text
- https://s3.amazonaws.com/norozovijalu/bee_movie_game_100_save_game.pdfIn PDF document text
- https://s3.amazonaws.com/zurovajij/rerifesepumikiboxabuvi.pdfIn PDF document text
- https://s3.amazonaws.com/rutufokedizon/mera_bhola_hai_bhandari_lyrics.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000108a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108A3	8300 bytes
SHA-256: `bd225b9a000f47a1132abb16ae252a7f1bc35eb8cc9269a47f2a65ff242579a8`
`font_01_sfnt_off0001235c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1235C	5016 bytes
SHA-256: `91f1d6f4de966895e06ebe8717ccfb616d1ee43da43bfefee9b7d8969acbd025`
`font_02_sfnt_off00013492.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13492	19360 bytes
SHA-256: `62720df05875848514c35e456c201462f0ba4a5fb50d6b0b292e06413522047d`
`font_03_sfnt_off00016ea7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16EA7	16132 bytes
SHA-256: `6c511cd2548aab1566dad8f54fccf2be4cd056cf5a4d5d56937977fde9165995`

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