Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da9610121c900b9…

MALICIOUS

PDF

76.2 KB Created: 2021-04-04 23:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2ebb883e1fde9911dfe3bbe6ad7dbfd4 SHA-1: 507faba13c00376285814c193812ad4a939702a3 SHA-256: 6da9610121c900b9505b96e3eebaa0773bb6526092f3c3aee0aa22a4955d156f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://lozipotod.ru/award?keyword=tabla+abdominales+hipopresivos+pdf PDF link annotation
    • https://fepavibubezi.weebly.com/uploads/1/3/4/6/134611462/1836333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_5fd2de9b6fba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_603b214d7c670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_5fe854bbb1859.pdfIn PDF document text
    • https://tobedetileva.weebly.com/uploads/1/3/5/3/135337372/boselu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450501/normal_6056a49c85b26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420036/normal_601d13a4e70aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489733/normal_5fda10db677da.pdfIn PDF document text
    • https://liwotagavujid.weebly.com/uploads/1/3/5/9/135961529/4881883.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d9d45f-4878-4fc0-a46d-ac214331da60/samsung_hw-h550_remote_control.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/zedidurekunemerovotorisa.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/jalexobunur.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/gomunug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0060fd2-df68-43e7-9921-d0d0698f2fc4/zezemetowiwejeramuza.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/wesumugefibenekowote.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/36946376504.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/87769622198.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/68012794839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c741479a-b693-443e-8ca4-24631cc682d9/pofagemibitodira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d1d34f-edb3-4046-92ac-f2624c00791b/greek_gods_list_and_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/felexajazoru.pdfIn 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_off0000ea24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 5428 bytes
SHA-256: 36f3ad939c856baa44d259ca4018d5be699ae6440b508bc5b2ee3633e80dcae8
font_01_sfnt_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 11552 bytes
SHA-256: 66ea3ded80f19321c6770e4b82f456619d97b42231c2927a76d6471fa36825f8

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