Malicious PDF — malware analysis report

Static analysis result for SHA-256 376f7e3d3699a3d6…

MALICIOUS

PDF

79.5 KB Created: 2021-06-11 18:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6db4e93aa2b46b09754b84b00e0c149c SHA-1: 17b24002edd088d0df99fc979027509b70c83804 SHA-256: 376f7e3d3699a3d6c8b735001c7d6dd5a8978bfef9e9fb676bc639e327869097
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 0.9998

Heuristics 5

  • 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 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://seumenha.ru/123?utm_term=immortal+unchained+strategy+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462362/normal_600f04830c3be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_60ba69336f24d.pdfIn PDF document text
    • https://karubidodofibe.weebly.com/uploads/1/3/4/3/134316277/198571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_60431acce0174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_603b2e54b1baf.pdfIn PDF document text
    • https://runigofotizete.weebly.com/uploads/1/3/4/4/134433234/gavidu-dosujibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_6025791e259b5.pdfIn PDF document text
    • https://buzubexod.weebly.com/uploads/1/3/4/0/134017192/xejipu.pdfIn PDF document text
    • https://fonomekaleguv.weebly.com/uploads/1/3/5/3/135308628/walasog_megixu_fekezi_kufuwose.pdfIn PDF document text
    • https://wininivawad.weebly.com/uploads/1/3/1/4/131483201/tewamogiwupaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490132/normal_5ff24b61dd72b.pdfIn PDF document text
    • https://zefowuji.weebly.com/uploads/1/3/4/0/134096403/putoxomofiba.pdfIn PDF document text
    • https://lotefexikig.weebly.com/uploads/1/3/4/0/134097130/1040147.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/7aafe5a6-c8fe-4429-b64e-43fb98d48ec7/how_to_watch_monster_garage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c0c3f0d-f665-4916-ae16-bb1331384b8a/application_format_for_school_teacher_job_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f03818f-ce9a-4843-a8aa-e0e0df165a87/54965211421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e7cc6da-0e4b-41c7-9505-77a540a31b48/zuzuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/281b9074-e866-43b1-90b2-93f8cda39f9a/daisy_powerline_1200_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68f08a29-7821-438c-8ae8-83adaa1f9007/how_much_does_a_er_pa_make.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

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_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 5392 bytes
SHA-256: a8d8173e4f2c9c588da38255bd98460156f04820d5122154b6bab687db03655b
font_01_sfnt_off00010bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC8 11052 bytes
SHA-256: 49ea314cdda6f4dfaf6c925cdc5a544da25fd29b2ec51880e98b091bde4398f9

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