PDF malware analysis — malicious · accb8bfcba2cde84

MALICIOUS

PDF

121.1 KB Created: 2021-05-20 05:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: f220fa3c24a646af45d9a55748865bf6 SHA-1: 6ae73fc80625047f6fdece098f4518adcd03d14b SHA-256: accb8bfcba2cde8469196aefa6d8c110d1dc601923621db83a9ae1007d9ba42c

66 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a primary malicious URL identified as https://mezovuduw.ru/strik. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to distribute malware or facilitate phishing. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 4

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://mezovuduw.ru/strik?utm_term=shin+megami+tensei+if+english+rom PDF link annotation
- https://jonaditogun.weebly.com/uploads/1/3/1/4/131408899/salaroxo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369933/normal_6057ec61dba98.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4460447/normal_5feee0584f20a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4390663/normal_5fceae8194830.pdfIn PDF document text
- https://nifubadipapa.weebly.com/uploads/1/3/4/3/134388301/093f54f742.pdfIn PDF document text
- https://kalogipewaga.weebly.com/uploads/1/3/4/5/134595512/2721887.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501198/normal_60251ba375488.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373243/normal_6023300806ed4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4452398/normal_5fcea52dc42cb.pdfIn PDF document text
- https://xegiwisupanax.weebly.com/uploads/1/3/4/3/134367095/givapukugexev.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481520/normal_60544523c36af.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444864/normal_604fc8fa7aa14.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/tidigudetefumof/good_thread_count_for_sheets_reddit.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0dccce7c-f6f4-49d0-b755-a2b55202a370/why_do_elements_in_the_same_family_share_properties.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/545e9b50-12a0-40b8-9ffa-cdbe9ad605f0/willy_wonka_and_the_chocolate_factory_2005_cast_now.pdfIn PDF document text
- https://s3.amazonaws.com/zamuriza/sankatahara_ganesha_stotram_telugu_lo.pdfIn PDF document text
- https://s3.amazonaws.com/batoragubukepo/15704129993.pdfIn PDF document text
- https://s3.amazonaws.com/kifutizijebuj/wulojudulososewafafaginu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/62445072-63fe-44a0-a4e8-3b49ceefdd96/50_shades_of_freed_songs_mp3_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c7eeb165-21d8-45ce-8b87-0ec2572079c0/94323429048.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/66886d55-5eae-4f11-9afe-64933ae91781/mississippi_trial_1955_chapter_10_summary.pdfIn PDF document text
- https://s3.amazonaws.com/lonozote/what_is_the_feminist_legal_theory.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_off00010a31.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A31	48508 bytes
SHA-256: `a2e9cc61cda8adc1dbca995f0e3f6fa286d4cf40dfb6d7d7bb3d10563d4160b3`
`font_01_sfnt_off00019f9f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19F9F	5284 bytes
SHA-256: `2ec0624108c2f122a47e2182b8df3ad007fcf6078e6f3536cc145da1a8b8fee9`
`font_02_sfnt_off0001b16d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B16D	10928 bytes
SHA-256: `59c22b0bd33f73300783a544c04439548f60e067a8430ced7e2ca5b45d784b99`

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