Malicious PDF — malware analysis report

Static analysis result for SHA-256 5226527c5260e286…

MALICIOUS

PDF

83.8 KB Created: 2021-05-06 08:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 37a6bd99eca8b0e40ec4c8fe70fca6e1 SHA-1: 717e5022710d81c778e9a9e2f669ce190c0e4690 SHA-256: 5226527c5260e286408ea8d2a6d06b970c3670bd38419b1aa8d930c205cbfd85
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://lozipotod.ru/strik?utm_term=el+arte+de+no+amargarse+la+vida+ingles PDF link annotation
    • https://cdn.sqhk.co/bapulofuw/wPMhbr0/48626954349.pdfIn PDF document text
    • http://discout.online/42306618514j2rp8.pdfIn PDF document text
    • http://magic-spring.com/nodelawazileqdhmr.pdfIn PDF document text
    • http://gromstroy.com/lubabikekarule4639h.pdfIn PDF document text
    • https://cdn.sqhk.co/puruwedisuma/mT8KSjc/jusedewalex.pdfIn PDF document text
    • https://cdn.sqhk.co/poxirowo/09bY3ic/snow_white_prince.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403421/normal_5ff66caa34e9a.pdfIn PDF document text
    • http://indital.space/pozekot4pow.pdfIn PDF document text
    • http://shopyou.online/statistical_methods_for_psychology_8th_edgk5hw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_f6909d47d20b46afac12a5f2049bc7b7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a23abb9-ef29-4cc7-955b-df5fcf1363ad/ferrari_california_t_for_sale_dubai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d3140ed-8e05-43d5-9092-c2db744525ef/jekowatizurifebufokomase.pdfIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_a529c012d6704ca188e87107d0269fb6.pdf?index=trueIn PDF document text
    • https://5e7fdb44-65a6-4d88-9b36-b69c04d36e08.filesusr.com/ugd/b547b4_8f0d3d1098b34e31a79be6ed31532a69.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e231644a-88a7-4123-83d5-b77e47cc7de9/vistas_5th_edition_answer_key_online.pdfIn PDF document text
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_3827763437cb4431ba08be912bb22115.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C6 4952 bytes
SHA-256: d0de879b9deefa87d0a1d851a59c67e3e26088e74dddc7a577fe1f81c3cbb340
font_01_sfnt_off0000f788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF788 11352 bytes
SHA-256: cdff96c6aff6fb6834b27f2eee978b7e247987303342e5f168bd82585a13e2b3
font_02_sfnt_off00011e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E71 16172 bytes
SHA-256: b6b14b20cb7f68c9745c0e755cdf17ed5e1c072f44a65a23069e6edae17d61ba
font_03_sfnt_off00013374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13374 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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