PDF malware analysis — malicious · 8976bfd4f48ef86b

MALICIOUS

PDF

169.0 KB Created: 2021-04-03 05:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: 0d6e63fd82377d456db2c155aca5e7f8 SHA-1: 411ded1deedaa0213a61b0d554007cf8f4464fad SHA-256: 8976bfd4f48ef86b6e107161aa745e80971d2eda158ce72431455d1333d21497

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a prominent one pointing to 'resalured.ru', suggesting a redirection to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable domains, further supporting a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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://resalured.ru/123?utm_term=training+certificate+template+psd+free PDF link annotation
- https://zulunapakaf.weebly.com/uploads/1/3/1/0/131070820/0d6c1864d9eeb5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4424405/normal_5fcbf293d2815.pdfIn PDF document text
- https://cdn.sqhk.co/fofesali/QBbRii7/block_hexa_puzzle_game_apk.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403539/normal_6018681706e7f.pdfIn PDF document text
- https://givolejemaxo.weebly.com/uploads/1/3/5/3/135345859/ribowepu.pdfIn PDF document text
- https://cdn.sqhk.co/fasotaluvose/hiWLjf2/basketball_players_images_hd_download.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416661/normal_60124eda61a76.pdfIn PDF document text
- https://cdn.sqhk.co/nowonipewo/gaHoibG/zuterezumunodosekat.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417214/normal_603f4c6a254d3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366063/normal_60542e136c4d8.pdfIn PDF document text
- https://cdn.sqhk.co/marivefigus/1f2blfU/venus_fly_trap_looking_pokemon.pdfIn PDF document text
- https://puxizabub.weebly.com/uploads/1/3/1/4/131406372/nekuxukuduwesebunize.pdfIn PDF document text
- https://gipazekafasulal.weebly.com/uploads/1/3/4/6/134600210/ef1789edd7a945.pdfIn PDF document text
- https://cdn.sqhk.co/ninulekuto/jricg56/lucky_lottery_ticket_scratchers.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/zerejibixupav/47899429992.pdfIn PDF document text
- https://s3.amazonaws.com/vunizi/perevizurej.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fae4c9c8-90c4-4825-a513-e6d96950163a/79131596746.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/85c72f29-5806-4fcb-aacd-2152aa8c1ad9/sketchup_software_free_download_for_windows_7_32_bit.pdfIn PDF document text
- https://s3.amazonaws.com/runuzitexokol/job_application_writing_format_in_english.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fe7d972b-1f5e-4c22-bc50-156d1eeebbe3/32404308242.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_off00018ce6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18CE6	60004 bytes
SHA-256: `80c28881b8e7537a02696b9a72a6249c9c2de944058199769f04f6ef35531df6`
`font_01_sfnt_off00024205.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x24205	5424 bytes
SHA-256: `84df0858fa8f2e46601d4a676fe83838b5be656f39e5e3b9a134b4541a895cfb`
`font_02_sfnt_off00025460.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x25460	11688 bytes
SHA-256: `e83f366a4c621845effe685ab9b4f46c22d3b4db204870e18fca36fafc469383`
`font_03_sfnt_off00027ad4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x27AD4	16828 bytes
SHA-256: `ea2ac2fca278768349b2615c0c792ba3e42df0d92188f4cd92bce66b2550f539`

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