PDF malware analysis — malicious · 21fd88733bbaa5cf

MALICIOUS

PDF

73.1 KB Created: 2021-03-20 22:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cf4d6ad1da16fd202df184c44ae39695 SHA-1: 273a613a01b76c55e8a8c7e3cf2ccf810299fcd4 SHA-256: 21fd88733bbaa5cfa82f122b17f885caa0956d91bc896179386856d6e7c4f19a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Zoom g1x4 list of effects', aiming to trick users into clicking the malicious link.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
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://vilenefex.ru/strik?utm_term=zoom+g1x4+list+of+effects
- https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/fubolijibopas.pdf
- https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/dodunilexe_wuxuse.pdf
- http://julivojurukumu.sportsontheweb.net/download_buku_ceros_dan_batozar.pdf
- http://nosixavol.sportsontheweb.net/luwiposarexiwe.pdf
- https://bokesaxigalul.weebly.com/uploads/1/3/0/7/130776824/zusamofus.pdf
- https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/8558362.pdf
- https://cdn.sqhk.co/nujizeres/ggTjjhc/30133841649.pdf
- http://jafoxidulez.mypressonline.com/present_tense_verbs_worksheet_1st_grade.pdf
- https://cdn.sqhk.co/fabavukunatu/jh4CLUC/ebay_daily_deals_free_shipping.pdf
- https://wesotapaxo.weebly.com/uploads/1/3/4/4/134488604/e5bd0.pdf
- http://feludekinopotas.scienceontheweb.net/bergey_s_manual_flow_chart.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/rumezo/75583175661.pdf
- http://sulorowanutabu.atwebpages.com/bsc_nursing_1st_year_books_download.pdf
- https://s3.amazonaws.com/matogapibelifiv/lugipumarefukafupekas.pdf
- http://vejegaba.atwebpages.com/bosch_dishwasher_silence_plus_44_dba.pdf
- http://deritaserewivi.rf.gd/donameto.pdf
- http://vofofoduwegakuv.rf.gd/harmony_hub_review_2019.pdf
- http://vidarixek.rf.gd/33090839608.pdf
- https://s3.amazonaws.com/mesixadelomomo/video_editor_free_for_windows_10.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- https://www.andertons.co.uk/guit
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dcaa.bin` `cec7f585693f43e653baf2bf56f4c157b9d060828249e947271da9bb70a3c7b5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCAA	5060 bytes
`font_01_sfnt_off0000edfb.bin` `edbec3f5b3088a58647bd6834cda7af10dc4ed676dcbf1b5c75bc301b926a11e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDFB	11704 bytes

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