Malicious PDF — malware analysis report

Static analysis result for SHA-256 b212e1b03190c42c…

MALICIOUS

PDF

74.9 KB Created: 2021-05-12 18:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c0e8f9eb3cb6694b8e5504bf22171ae5 SHA-1: d9dcc2239cfd66b62c0845405299a9bc9c981afa SHA-256: b212e1b03190c42c89ccafa7d0f712de82b31b9f6aa12f93a30713a1c7a64941
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing campaign. The primary malicious URL identified is https://lozipotod.ru/strik, which is likely used to redirect users to further malicious content. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or malicious redirection attack.

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://lozipotod.ru/strik?utm_term=the+creature+from+jekyll+island+sparknotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454550/normal_6020805fc5ef6.pdfIn PDF document text
    • https://joripulugafu.weebly.com/uploads/1/3/4/3/134318872/cb3b9436d9b0f.pdfIn PDF document text
    • https://poxesaxe.weebly.com/uploads/1/3/0/7/130738711/fatigufokela.pdfIn PDF document text
    • https://golotelarag.weebly.com/uploads/1/3/1/3/131382536/zixokenawukomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457577/normal_6056d31f2453d.pdfIn PDF document text
    • https://tikedamo.weebly.com/uploads/1/3/1/4/131453682/4091329.pdfIn PDF document text
    • https://tavigawatogup.weebly.com/uploads/1/3/5/3/135389884/534172b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369784/normal_5fe5d4ba2ef96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_fb5e07e6c2924a9ab7109e6c447b5db2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/faxaxos/futanig.pdfIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_5837560bc8d44dcfbe5f40be76f3068b.pdf?index=trueIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_cd7f1c30ef1c4cfdaf89d68168d6b29c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanaladu/exponential_function_word_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/free_piano_sheet_music_for_chopsticks.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/organizations_that_donate_furniture_to_families.pdfIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_ea7ed76157404882a726747f80469abf.pdf?index=trueIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_27710a1ca4c14afb98514dfb7b1ec211.pdf?index=trueIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_b1f821d0a9484fb0908818fcd4697e4a.pdf?index=trueIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_6397de8bb5204e79b662e49f99330140.pdf?index=trueIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_a60257aa367f47df84af75b01f8c2798.pdf?index=trueIn PDF document text
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_5161b542ea8b4ea7a5934dd783b06cda.pdf?index=trueIn PDF document text
    • https://d3919fa5-c020-464c-a773-72e456e10464.filesusr.com/ugd/29136f_fd6e3ec38bcd4a1182e6176af18294be.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_off0000e5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AF 5584 bytes
SHA-256: 248c93837757c371d75877564e19f1396e39834e3acf960a07417e997ed83f33
font_01_sfnt_off0000f895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF895 11104 bytes
SHA-256: b4ef707b508aac05ce95046ad6548f1be1b4072cb22eb7ddc743e17525dac0b4

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