PDF malware analysis — malicious · 24974bf009052509

MALICIOUS

PDF

75.1 KB Created: 2021-05-29 04:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20

MD5: 0364e368749d2143d0e0829e24099649 SHA-1: b0e2b43073700d81fd53484f262a18eb907d5240 SHA-256: 24974bf009052509e800f765f1cacc3b0d37c65289ff32ddea8f5d1960581ff4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to other PDFs, indicating a link farm or SEO abuse. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs and the PDF structure point towards an attempt to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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 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.
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://lozipotod.ru/wb?keyword=list%20of%20silly%20names PDF link annotation
- https://cdn-cms.f-static.net/uploads/4387562/normal_605cd23370ad5.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4412588/normal_60b16ba2bfbce.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417808/normal_6040e57490e43.pdfIn PDF document text
- https://xixutusolorul.weebly.com/uploads/1/3/4/6/134685478/nexitelemojaz.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4421062/normal_5ffd67833c608.pdfIn PDF document text
- https://tosofeguwus.weebly.com/uploads/1/3/4/3/134321705/xuwapuso.pdfIn PDF document text
- https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/4871077.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4408352/normal_5fff47f859a37.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409246/normal_5fd3b2e4e5caf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4425492/normal_5fea34ef7e6cc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466368/normal_601920f95261d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4495985/normal_5fe3eeb4dac64.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/9127d2fc-4d09-44c3-bab5-deed0f171f63/chup_gaye_sare_nazare_dj_remix_mp3_free_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d18f4b40-d497-468f-b014-862fba92eaa4/ficha_de_inscrio_desbravadores_word.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/94ab7ad0-cc47-409a-b2ab-fa0e9de48aaa/america_the_essential_learning_edition_second_edition_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6d8710cb-c7a9-4a95-a6fb-e3c8a370c084/how_to_set_up_lg_sound_bar_sl4y.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/801f9239-e60e-45a7-9097-15d1386ee217/80972264438.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f7246c96-45bb-4c28-8f33-bd146e99ccae/38419004835.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d7bb0b89-394e-462a-a88e-a14791dd0545/how_to_do_small_business_quarterly_taxes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5096d6b7-0159-4cb8-ab21-95753bbb1061/fisher__paykel_dishwasher_error_code_e30.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d5253b50-4882-4a11-b7fd-645d4c518f6c/equal_before_the_law_1968.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6a1b3458-39cf-4790-80ff-d43bb398f524/85915151470.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/00827cc8-2df2-4ec3-90ce-1d8b01a9ef44/the_game_awards_2020_time_gmt.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fb68ee46-fe45-43e4-9a5d-c4e231a2c92a/56813785388.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e7f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7F7	4860 bytes
SHA-256: `c2313f2ceb00ff9ff4f1e29ba0f20c6ee9200a7de32e6e6ab31ba52c9febefd6`
`font_01_sfnt_off0000f881.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF881	11144 bytes
SHA-256: `0d9cb09c676383c007047cc45259073021de1661754154828f967b9e99041f6c`

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