PDF malware analysis — malicious · c104b98f679ef1b1

MALICIOUS

PDF

77.6 KB Created: 2021-06-11 19:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 569b76ceb90a9a15202f7db29a82f9f1 SHA-1: 59d6ad56802372cadb19f2953d2606d451755a6d SHA-256: c104b98f679ef1b1dcb0880aaee49fc2cb6e36a47fcac2667667ae2e436e21be

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of a 'download button' heuristic further supports a malicious intent to trick users into downloading further content.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://smidgel.ru/pbw?utm_term=gta+5+highly+compressed+4mb PDF link annotation
- https://kegalanomer.weebly.com/uploads/1/3/1/8/131856310/20a60a9ce08b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4408599/normal_5ff13c7d4e66a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481836/normal_60480befd9b44.pdfIn PDF document text
- http://www.opentle.orgIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://wemilamozede.pbworks.com/f/progressive_verb_tenses_worksheet_4th_grade.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f3332468-db0d-4ea4-8a76-69585969ed68/91765470670.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d6aebdf4-cc9c-4532-ab56-3ea8c1e47716/how_to_make_female_mandalorian_armor.pdfIn PDF document text
- http://jitijaloj.pbworks.com/f/36053181086.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/81d31c34-4198-41a2-9eb6-3d142b1b6f9c/dungeonology_rules.pdfIn PDF document text
- http://furalagaposu.pbworks.com/w/file/fetch/144738660/how_to_measure_near_visual_acuity.pdfIn PDF document text
- http://vananizi.pbworks.com/f/new_desi_mms_videos.pdfIn PDF document text
- http://nilanom.pbworks.com/f/bilderberg_group_members.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/febce166-e24c-4bac-a772-2510ee262125/is_an_american_buffalo_the_same_as_a_bison.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fe4d69eb-ea04-4fef-a3e9-6f4999ce09c0/36657406901.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/44b0f936-7441-4a3f-9e61-bc16accc5cad/interview_questions_for_hr_managers_and_answers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f5516e38-0245-42d5-8ac2-d4e6a3dc8df1/does_moroccan_oil_cause_acne.pdfIn PDF document text
- http://wisarazed.pbworks.com/f/how_do_you_calculate_the_weight_of_corrugated_sheets.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://www.gnu.org/licenses/gpl.htmlIn 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
`stream_003_off0000e6b5.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xE6B5	10044 bytes
SHA-256: `296a2840e6bd4958fd670871e63f3658d54fa35683fdf64d13aa3a581c2ab38b`
`font_00_sfnt_off0000d28c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD28C	5972 bytes
SHA-256: `a7c97122f5aeab96e94941a7138209f93940bf0616244b5f0dd784c98c946688`
`font_02_sfnt_off000102cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102CD	11164 bytes
SHA-256: `284954a22c285c325855316aba196b629baf9e8c037c7f06265303f88818f36a`

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