PDF malware analysis — malicious · 51d35e02adda7830

MALICIOUS

PDF

86.8 KB Created: 2021-03-23 09:20:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 5431f513f17477ba0037f518f87f5192 SHA-1: ec4f793e8c6548299befe61515eb273e822a400c SHA-256: 51d35e02adda78307c24212d25812056e63f5dd5511b167633fbdb2a3069f201

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://nipisod.ru/strik?utm_term=bronze+age+mindset+pdf', suggests a lure related to the 'Bronze Age Mindset' book, likely to attract clicks. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware distribution via a link farm.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 5

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.
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://nipisod.ru/strik?utm_term=bronze+age+mindset+pdf PDF link annotation
- https://vagewojevibo.weebly.com/uploads/1/3/4/8/134873572/2fd87ae2.pdfIn PDF document text
- https://cdn.sqhk.co/vemonososepa/NF6ib1a/romudigesisixef.pdfIn PDF document text
- https://lekozeva.weebly.com/uploads/1/3/5/9/135964777/3ce199ee.pdfIn PDF document text
- https://cdn.sqhk.co/rumoligodo/8Yghlji/sakura_school_simulator_update_mod_apk.pdfIn PDF document text
- https://cdn.sqhk.co/parikozug/hbHORTY/little_princess_adventure_game_free_download.pdfIn PDF document text
- https://cdn.sqhk.co/guvawatuzax/snighcx/mineplex_micro_battles_map_submission.pdfIn PDF document text
- https://bewobuvepo.weebly.com/uploads/1/3/2/6/132695749/kevoxekawex.pdfIn PDF document text
- https://cdn.sqhk.co/bavozazav/jhebuhd/las_vegas_city_travel_guide.pdfIn PDF document text
- https://nepubodi.weebly.com/uploads/1/3/4/6/134610278/fepopelusat-rawuvemosid-torug-modirawuju.pdfIn PDF document text
- https://zajutarox.weebly.com/uploads/1/3/0/8/130814803/7098557.pdfIn PDF document text
- https://cdn.sqhk.co/denepepunuja/fietEoF/face_mask_on_necklace.pdfIn PDF document text
- https://cdn.sqhk.co/derebeduno/7LK9jgC/foxyland_2_ps4_trophy_guide.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/sazariwapa/34619134177.pdfIn PDF document text
- https://s3.amazonaws.com/wewuxuviwar/grammar_worksheet_year_8.pdfIn PDF document text
- https://s3.amazonaws.com/nemafu/chemdraw_free_with_key.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/13c76d5f-dee8-41f3-a59e-1d7dc23990b6/enoch_calendar_2020_lds.pdfIn PDF document text
- https://s3.amazonaws.com/wotodedaruzuk/tru_talk_video_free.pdfIn PDF document text
- https://s3.amazonaws.com/jiwisi/machine_breakdown_analysis_template.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c29b72b8-e074-44c8-be22-117468a23068/best_cyber_security_courses_online_australia.pdfIn PDF document text
- https://s3.amazonaws.com/pogolo/artificer_3.5_guide.pdfIn PDF document text
- https://s3.amazonaws.com/gowebabuxogiro/ntsb_accident_report_search.pdfIn PDF document text
- https://s3.amazonaws.com/wonumafubij/27771358620.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/94282a84-428d-4c0d-8142-57fab858d511/sibaweruratigowilujob.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/afbc92dd-4425-45c3-a371-5168b73cc3de/lovijob.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000103a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103A5	5216 bytes
SHA-256: `3d01351431184e297f988fb1edee69e9e52887d16bbfe2356c09a521bac4e369`
`font_01_sfnt_off0001154e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1154E	12664 bytes
SHA-256: `34497685eac5d99d755512602647061ca8ac0f4379c3c814608ef78d87b81e29`
`font_02_sfnt_off00013e7a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E7A	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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