Malicious PDF — malware analysis report

Static analysis result for SHA-256 0567eedda1d238cc…

MALICIOUS

PDF

46.3 KB Created: 2020-10-27 17:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fbe5603dd576cf4aff0bc8aa4ea0c4d6 SHA-1: 1322c09f08455c31a56b970dfcbbc8ac5186f479 SHA-256: 0567eedda1d238cc8650b29a166c821c550d0cefc70d6c65f9dfb372e26f38eb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple critical heuristics as malicious, specifically for linking to known malicious redirector infrastructure and participating in a link farm. The document body, though partially corrupted, contains URLs that are likely part of an SEO manipulation scheme to drive traffic to malicious sites. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=how+to+stagger+vinyl+plank+flooring In PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/4800481.pdfIn PDF document text
    • https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/1651000.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/bafikabesa.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/rutekonenezosovig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5f94187ef1e53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5f8d1af42c3d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_5f92173f46a11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0005/9833/files/30711696355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/16400387029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9115/5361/files/all_pirate_camps_fortnite.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/73065881268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c1773bb-e54f-4d00-b711-36f94ddc7986/adventurers_backpack_skyrim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d416dd6-871c-4f6c-980e-934a8d68abf4/gifefezagelokuvafex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44595ae-5a2d-4cac-8a53-fc5a0824dcb7/poninifopixemume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99e2c583-e775-4892-a931-866fbacf9f15/xofutedenaxotegopero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc7111c-9735-43c8-b0af-fb8b3fd86418/davugixogozenud.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/anti_ragging_online_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/agendas_escolares_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/54605438817.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/2668809516.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/machining_of_composite_materials.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.

FilenameKindSourceSize
font_00_sfnt_off00007532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7532 5348 bytes
SHA-256: b98eec9a9e54e7136b0a7bfb0c5d343cdeda841a8157d5b1b8a93a61bfb74b71
font_01_sfnt_off00008793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8793 10536 bytes
SHA-256: 663b8305fd5ad998e8e86719a758af35e82c8addb2d134bdbfa6b5a72ebf4e77

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