Malicious PDF — malware analysis report

Static analysis result for SHA-256 111782b5ede684d4…

MALICIOUS

PDF

73.2 KB Created: 2021-03-06 14:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b5c3c7dcd9daf3be2dd3890d56604dcb SHA-1: eb2398c9a482d1d4db05f5d5bf0006f80a152eba SHA-256: 111782b5ede684d431903a8ec6f000508815d535bf04d26e1230cf45f8169ccb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO abuse tactic. One of the embedded URIs points to a suspicious domain, 'botokaw.ru', which is likely used to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wb?keyword=pillars%20of%20the%20earth%20season%202%20cast PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5fe84117a9859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465136/normal_602daec2deae2.pdfIn PDF document text
    • https://cdn.sqhk.co/mixukavusu/3PB5je8/yes_that_dress_mod_apk_no_ads.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_60318352a2fac.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/6hjdurl/bird_of_paradise_plant_care_fertilizer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392666/normal_60384f20d0cfd.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/e0hjgig/guns_and_glory_leroy.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/90024290096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d558be-9bde-412c-af6c-d1e20ed00034/amazon_prime_video_subscription_cancel.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/subject_verb_object_worksheets_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aae4275-579a-4ec2-815a-92de6ff4fecf/xavabiwigipuxi.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_f6465fdc1ac34cad9fa4ebdcf37e8cf7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb4d1c76-9cf3-4434-aa00-f545d9f2a10c/jipanigokomanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75cba689-6c4e-4fc4-bcc9-566c17a9067c/moviwi.pdfIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_13e8279380304578b865878c020bd704.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a9c57c2-2b64-4760-b114-29bb0e8bc344/pinal_county_solid_waste.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10cb18e0-de7a-4db5-a2d1-3a00326a82dd/boss_ls-2_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f7190a-c57d-4b72-99c2-56b1635eaa48/85499958652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c08ab4d0-bf5d-4e0d-a722-c473dd26f900/the_company_of_wolves_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95aa884-ae4c-4a29-bb18-f958c5b6ae28/watowabokeposodiw.pdfIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_03f083a54b3f4b69b09e8d009e7bf259.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e488b16d-0f19-487f-b267-67b84b948ecd/how_covid_19_affected_employment_in_india.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_off0000e21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21D 5104 bytes
SHA-256: 10933f47db9aaa52fc8f776d98b42b96040c7c8eaae51db93eb1dd9cc4a5401c
font_01_sfnt_off0000f372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF372 10560 bytes
SHA-256: 8ed940ea89aba90deb6db388602373eb6cd25ef4b66bffea7586093a3bbcc483

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