Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7009dbf9c392f5…

MALICIOUS

PDF

80.9 KB Created: 2021-03-11 05:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 7ea46ac23d66e4bd2e9e572f80e29bb4 SHA-1: 611a9a44b58993fe92d19a0beb48fdb9844fb321 SHA-256: 5f7009dbf9c392f514fa29c8a0e24df0cd2301ffb1f86c8dcb445dc36393f4d8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a high-confidence heuristic flagging it as a link farm on disposable hosting. The primary malicious URL identified is 'https://botokaw.ru/strik?utm_term=hoover+elite+rewind+plus+won%2527t+turn+on', which is likely used to deliver a secondary payload or conduct phishing. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', further indicating malicious intent.

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 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://botokaw.ru/strik?utm_term=hoover+elite+rewind+plus+won%2527t+turn+on PDF link annotation
    • http://smeh-mif.space/2032166687dotyp.pdfIn PDF document text
    • http://kajejib.medianewsonline.com/berizoxig.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/job_interview_question_whats_your_biggest_weakness.pdfIn PDF document text
    • http://se-mrush.com/83764213757byhsz.pdfIn PDF document text
    • http://arthromedro.xyz/38236622342h21ab.pdfIn PDF document text
    • http://bibivire.mygamesonline.org/nasogeboj.pdfIn PDF document text
    • http://uorott.com/vaseline_petroleum_jelly_sds_sheetsfejo.pdfIn PDF document text
    • http://fewudutizoxom.medianewsonline.com/abc_anarchism.pdfIn PDF document text
    • http://fragcups.com/75883423295mjd6s.pdfIn PDF document text
    • http://how2clever.com/zomakeboramelupeten6xhhw.pdfIn PDF document text
    • http://petrol-v-pol-price.site/93756253564ss2iy.pdfIn PDF document text
    • http://vseti.life/guide_super_mario_maker_2xggrc.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/spare_parts_joshua_davis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_d8bf20f7e49c40ec976441981198a59e.pdf?index=trueIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_0aa529db226c4070978681d42c789e7d.pdf?index=trueIn PDF document text
    • http://xomapagovujux.atwebpages.com/fisagasa.pdfIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_277ad9bcde7842e48a9daa2ac8d4ffa1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/communication_skills_for_the_health_care_professional_concepts_practice_and_evidence.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/pugipofarodowiritenutukov.pdfIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_24f728fa12df41e3acc2dcf0fb5c5af1.pdf?index=trueIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_d38d248a74924c3abc72ea7152546f09.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/febopa/breach_of_warranty_claim_form.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_off00010239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10239 4892 bytes
SHA-256: cefbdc92c68afe165cbb7bc542ec91525a379b29706535fc01dfcc009fec1dc0
font_01_sfnt_off00011305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11305 10228 bytes
SHA-256: 022e14fbb6dc1e7e915f85b22a15d8b9739dd437475fe772ba7533495de440f4

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