PDF malware analysis — malicious · 2ed6887e061b8233

MALICIOUS

PDF

89.4 KB Created: 2021-03-09 04:39:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: edfd34a2ba538c34d3577e473936af4a SHA-1: 5158e101493bd15200d7e36278f12a73e7d0b5b1 SHA-256: 2ed6887e061b8233a9745c5782bb45cabdb9ec17808ba0d2ad0bdde63559cd18

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('baarspo.ru') that is likely part of a link farm designed to redirect users. The PDF structure and the presence of embedded URLs suggest an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 5

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 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
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://baarspo.ru/wix?keyword=a+thousand+splendid+suns+farsi+vocab PDF link annotation
- https://cdn-cms.f-static.net/uploads/4409798/normal_6015562a67066.pdfIn PDF document text
- http://strgb2.ru/the_magicians_wiki_season_5v50jk.pdfIn PDF document text
- http://new-leggins.site/boston_logan_airport_map7harc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4452193/normal_5ff760c88e53b.pdfIn PDF document text
- http://samelike.site/word_search_game_garden_essentials8qn5c.pdfIn PDF document text
- http://tryse.xyz/city_of_saints_and_thievesr0rya.pdfIn PDF document text
- https://cdn.sqhk.co/zaborofisi/ggjDpjd/29082908185.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4482027/normal_60014a30602ab.pdfIn PDF document text
- https://cdn.sqhk.co/sidamebo/jjhbjgJ/megabus_phone_number_memphis_tennessee.pdfIn PDF document text
- https://cdn.sqhk.co/nimabugokofa/icjjgj8/back_wars_apk.pdfIn PDF document text
- https://cdn.sqhk.co/nepasibuta/Ffiechc/mr._bowling_ball_arborvitae_for_sale.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/037fb321-d15c-401d-a81f-1bbbc94d6e83/production_and_operations_management_books.pdfIn PDF document text
- https://s3.amazonaws.com/jujadodedaruxix/84587825516.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e8b3bd3f-d714-4cf6-a369-53a3533d40ef/who_are_the_rich_brothers_gardeners.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5699295e-7d18-445b-bf38-a8a34f1fe06d/kefejumapeder.pdfIn PDF document text
- https://s3.amazonaws.com/tuzamada/you_know_something_is_wrong_when.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4ddc2db6-909a-4a3b-ab9f-bf69fd96759e/tebonasepalitopatawugi.pdfIn PDF document text
- https://s3.amazonaws.com/wajibile/odd_thomas_full_movie_online.pdfIn PDF document text
- https://s3.amazonaws.com/zafaronivaj/48674498945.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c90317d8-ddd0-4578-8212-40050e9f6cae/39206083648.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/077b1d07-13ee-4ad8-816e-c8b0dbb4d870/liftmaster_not_closing.pdfIn PDF document text
- https://s3.amazonaws.com/litunux/achat_vhicule_d_occasion_au_luxembourg_formalits.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010a90.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A90	5432 bytes
SHA-256: `1f01eed561de03bebb81498a549c51564e007968a10c6313e8470f705d4d164a`
`font_01_sfnt_off00011d0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D0D	10504 bytes
SHA-256: `e9fd6c770aea95203af5b09ade42c784325b2c567cc3aad95000567cb349975c`
`font_02_sfnt_off000140a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x140A2	16632 bytes
SHA-256: `bfa32af85ed9733e9d329932c5444ef017f43cd1cf31216f18da05059aa2c43f`

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