PDF malware analysis — malicious · 72010643c8023f5b

MALICIOUS

PDF

83.6 KB Created: 2021-04-01 10:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 4d484a1a0178d8109b7210551cdc601d SHA-1: 7858e2777b092cd35d33ba0734be9790ed97ae1c SHA-256: 72010643c8023f5b3d3c560449ac3913fd9d53678a27c219fc835ce155939106

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one specifically pointing to 'jottigo.ru', suggesting it's part of a link farm designed to redirect users to potentially harmful content. The presence of multiple embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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 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://jottigo.ru/award?keyword=bourse+des+valeurs+de+casablanca+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4421776/normal_602cb22407dc4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445735/normal_5fceb3a0c3bbe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412164/normal_6051153ed1e74.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4372682/normal_5ff569724b79e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4487647/normal_60083b81a595c.pdfIn PDF document text
- http://tujasumetozuku.22web.org/pesologesasoso.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393776/normal_5fd7b58da585f.pdfIn PDF document text
- http://accueilcmb.com/will_and_be_going_to_exercises_ego4un2nkn.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4418783/normal_5ffbe77b2b23d.pdfIn PDF document text
- http://lnstagramsupportinfo.com/692178264453qpfw.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366365/normal_6063b76ec2151.pdfIn PDF document text
- http://islta.fun/chromedriver_for_selenium_coc7qs.pdfIn PDF document text
- http://1xbet-registr.site/handwriting_calligraphy_fontylv8l.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446649/normal_60241aa81e3e4.pdfIn PDF document text
- http://investmag.org/soil_mechanics_and_foundations_3rd_edition_by_m._budhu_solution_manual913xa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382423/normal_605f2dba41d52.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/0f450d94-d757-45c5-967e-08b79967f812/rugurerim.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/04b0dd35-a466-4191-a2be-65d817c99d0d/zoo_york_watches_waterproof.pdfIn PDF document text
- http://koxirekal.epizy.com/31593839408.pdfIn PDF document text
- https://s3.amazonaws.com/xovekolamoxe/38372933449.pdfIn PDF document text
- https://s3.amazonaws.com/kosamupim/assassin_creed_liberation_remastered_trophy_guide.pdfIn PDF document text
- https://s3.amazonaws.com/bisiku/reducing_to_lowest_terms_fractions_worksheet.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0fb3b6a0-233c-4a9e-87da-08c02432c943/gunuwamiwakuxeduwur.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_off0000ec59.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC59	5400 bytes
SHA-256: `b5a8a56fe310dc7c3bec2834cbaf842910d8459d88eda56367982e4e5b7fe604`
`font_01_sfnt_off0000fec6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEC6	11888 bytes
SHA-256: `cb5d5721b2b1ca64bcbe49baf5f26eda48b696528a734bf394b5a5820693406b`
`font_02_sfnt_off0001259c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1259C	17376 bytes
SHA-256: `10c3f732c5583118313e0f235c5475a72456a889862f8abc113674bb55cd79a4`

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