Malicious PDF — malware analysis report

Static analysis result for SHA-256 e064415596955a61…

MALICIOUS

PDF

68.1 KB Created: 2021-03-05 06:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8d23b0fd5d66b051f7fb3d3ae3f1a960 SHA-1: 490793de908ff611c99cefa11eaff6076e107952 SHA-256: e064415596955a6145b1bb43ae12e61f9d5625a553bc969f2f72492a6e54c1e8
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. One of the embedded URLs, 'https://baarspo.ru/wix?keyword=introduction+to+circles+quiz+answers', is likely part of this scheme to drive traffic to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=introduction+to+circles+quiz+answers PDF link annotation
    • http://widuzuduzudovix.iblogger.org/roosevelt_inlet_lewes_de_fishing_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463810/normal_602299be48fd6.pdfIn PDF document text
    • https://gewipilozu.weebly.com/uploads/1/3/0/7/130775211/pevasuzabagajafel.pdfIn PDF document text
    • https://sowidokobixu.weebly.com/uploads/1/3/1/8/131856306/tukivuloke.pdfIn PDF document text
    • https://pasetesosetoje.weebly.com/uploads/1/3/0/7/130775590/jowoxolukopilus_nonizanalokolu_tujewo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_603425ec24d1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_6013b9597abd4.pdfIn PDF document text
    • https://likimipezerejo.weebly.com/uploads/1/3/2/6/132682052/3077320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_603ec6624f483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419003/normal_601b9842b7e26.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/honda_eu2200ita_2200-watt_inverter_gasoline_portable_generator.pdfIn PDF document text
    • http://kadesevi.iblogger.org/benskydd_fotboll_storleksguide.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/norina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405206/normal_6006664539438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_603613d8d9c72.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/programa_para_honores_ala_bandera_24_de_octubre.pdfIn PDF document text
    • https://movamapipimopi.weebly.com/uploads/1/3/5/3/135303402/dojigixaj-setefug-jetig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_d643749d2cbe40249f2ce038ae286500.pdf?index=trueIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_704a45c3865e44aca7efb6e98e74e320.pdf?index=trueIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_a5e7126d6d2241caa792dd98c865fd9c.pdf?index=trueIn PDF document text
    • http://duvodix.myartsonline.com/kebeva.pdfIn PDF document text
    • http://puxitisajit.epizy.com/80919147267.pdfIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_37457432d476409e8e15e6a15ac6b207.pdf?index=trueIn PDF document text
    • http://webekilijonelew.epizy.com/avery_5161_template_for_mac_pages.pdfIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_cf53ab8db01a439083fd43bb33b8141d.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_off0000cfdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDF 5136 bytes
SHA-256: 3b55947b1f796acbab3eec6a48d3def298c4be369e80a14ed9dd88f20a21c6c7
font_01_sfnt_off0000e178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE178 9716 bytes
SHA-256: 6730aa8f84282a09051dccd6bd239b7a2b39864e3434c783062ab64c88ae9d86

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