Malicious PDF — malware analysis report

Static analysis result for SHA-256 2578153aefd95304…

MALICIOUS

PDF

79.3 KB Created: 2021-03-27 19:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d679ebf2e2f501cbbeabd5a6c99d4700 SHA-1: 102c2daa2b586b9e8cbb6a7707849ac7e657a5ef SHA-256: 2578153aefd953043988abda578ab938e4d8084a18fa2985a0e9ce0387e7f2fa
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/award?keyword=birkat+hamazon+sheva+brachot+pdf PDF link annotation
    • http://bejawutipage.mywebcommunity.org/el_libro_de_urantia_precio.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/8972819.pdfIn PDF document text
    • https://mozakemu.weebly.com/uploads/1/3/0/7/130738716/3d9a300853aa.pdfIn PDF document text
    • https://vufemare.weebly.com/uploads/1/3/4/8/134855896/586091fd1.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/73162788556.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://245ae9ba-e923-43ed-bc11-30ed5d1acd78.filesusr.com/ugd/051519_af48e7cc7a154f37b64fcdd8eed75784.pdf?index=trueIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_980df931b3f648f8a04241e100e16d3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/2699804523.pdfIn PDF document text
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_e15ea5b86fcd48399430cdef8f1d1add.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/dawibimez.pdfIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_1c00ed5850594542840901f143f0f0ea.pdf?index=trueIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_1f69b4f1c4f34a6bbd69f943c81cb9cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xetasif/new_released_bollywood_movies_2018_free.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_9a90ddb643e84598b782bc605de082e6.pdf?index=trueIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_a50ebc0918b141bdb938a6cffe86988b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/how_to_be_positive_thinking.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/how_to_see_range_on_tesla_model_3.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/vavivawigawawol.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/wepupirixuxo.pdfIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_e315f2a04cc0446db63696aeb29cc8f9.pdf?index=trueIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_f010d7a5e48c448395ccc1f36c645039.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 5724 bytes
SHA-256: 687461ff9ac2ad79950f4f6628704ace5a24a17534decc2f72c8727338b0b6ec
font_01_sfnt_off000108a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A0 10996 bytes
SHA-256: ecbec85418865d661eaed9f4884c9359b6a20b752f2a5b575e739669f510282d

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