Malicious PDF — malware analysis report

Static analysis result for SHA-256 d222053fd358a366…

MALICIOUS

PDF

76.6 KB Created: 2021-04-28 08:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3764b92565d94d6fa0b289ed695feb7a SHA-1: 5ca5f2890a59aa9ace03c4cc3684144e4340b172 SHA-256: d222053fd358a3662b8afe1eb23d0df664be61e3a2c5ecc15bd29fac02a00e75
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, https://xajibur.ru/strik?utm_term=how+to+use+a+portable+air+conditioner+with+a+crank+window, appears to be a redirector. The presence of numerous external links points towards an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://xajibur.ru/strik?utm_term=how+to+use+a+portable+air+conditioner+with+a+crank+window PDF link annotation
    • https://cdn.sqhk.co/kurotevu/ikiauXt/city_island_airport_2_hack_apk.pdfIn PDF document text
    • https://vexojuvij.weebly.com/uploads/1/3/4/3/134345090/2908367.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482403/normal_5ffff60a72997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_604c9c2aeb962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_605c664833dec.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/ihcibhc/21705457769.pdfIn PDF document text
    • https://minunelojob.weebly.com/uploads/1/3/1/4/131453060/5639311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_6056e06adf864.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/oibOfDT/doom_patrol_characters_in_titans.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/f0jhHih/short_speech_on_my_birthday_celebration.pdfIn PDF document text
    • http://safilow.iblogger.org/ernesto_che_guevara_biography.pdfIn PDF document text
    • https://laregupofonel.weebly.com/uploads/1/3/4/4/134464195/wutopunegurozu_nenenosaliga_selajoxuz.pdfIn PDF document text
    • https://kiwaluraxipexe.weebly.com/uploads/1/3/5/3/135326690/4182288.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kakarares.epizy.com/34961500236.pdfIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_dc6fae2ea7fa4280a307c90a5e3e2b9a.pdf?index=trueIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_8e31d7bb0f1542d2a53d33554ded056b.pdf?index=trueIn PDF document text
    • http://robabunegulawi.rf.gd/adjectives_of_quality_quantity_and_numbers_worksheets.pdfIn PDF document text
    • http://zafipivixazuk.epizy.com/fortnite_bingo_sheet.pdfIn PDF document text
    • http://zilanun.epizy.com/70789166806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c79bf4de-e96e-4180-a385-0d24912a9a3f/ascend_the_hill_hallelujah_what_a_savior_lyrics.pdfIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_84cfe3455f5141d78f59f2fef54665c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f5a00e-c257-4cf2-a706-402967e7df5a/79108196932.pdfIn PDF document text
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_9f605903674c430e8e29a53792672bc7.pdf?index=trueIn PDF document text
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_e02b5e0feffe493292f79ea6c097730c.pdf?index=trueIn 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_off0000ebad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 5416 bytes
SHA-256: 8708a296eba258643d3c9b737e7d00d3796d650e92b571fea83cb1abd9a57f94
font_01_sfnt_off0000fe15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE15 11268 bytes
SHA-256: 21f788f5771de572589a2a8ca3dfa501f06a330e7556c35f3378b8472b84fbbe

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