Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47c5cb3911c0c26…

MALICIOUS

PDF

154.5 KB Created: 2021-05-28 04:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 656da2309da96127612da55e383291d2 SHA-1: ca3090f37cb6bc3874d2d494c2418839b3412be5 SHA-256: a47c5cb3911c0c261bf258c6a12245bff46ea55912b844b504b491bbb611b48b
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-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://mezovuduw.ru/123?utm_term=abdominal+trauma+surgery+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482849/normal_5fc961bbcb43b.pdfIn PDF document text
    • https://rivabugejovo.weebly.com/uploads/1/3/0/7/130739095/6129604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404723/normal_6050f40ee48a5.pdfIn PDF document text
    • https://minomawisagu.weebly.com/uploads/1/3/5/9/135956859/wezivovevus.pdfIn PDF document text
    • https://jowetirepenu.weebly.com/uploads/1/3/1/3/131383619/kijetika.pdfIn PDF document text
    • https://rodironamo.weebly.com/uploads/1/3/5/3/135347674/7987536.pdfIn PDF document text
    • https://pamumigupoxip.weebly.com/uploads/1/3/4/6/134614169/864139cb48f12.pdfIn PDF document text
    • https://kofudoraf.weebly.com/uploads/1/3/4/7/134716635/xiwub-vorepewewufarow-nabowumaw.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/6267c953-4451-4838-90a7-d2a82f9c3aa3/how_do_i_save_a_route_in_google_maps_with_multiple_stops.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b440a5be-d005-4211-a34e-e30031aee53d/dixuxafeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc2982b-742c-4549-94ec-25ac245c817a/call_me_by_your_name_trailer_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c8276f-da7e-4aa4-9940-be10f51063ac/65514304680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee100f8e-8b05-48d0-8463-60034712a829/ribobutageduruxedamowazom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5425897c-dea8-4e58-b529-f80b9e078ded/burepujofirewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d4ff888-c5a5-4072-bcf4-551778bb4921/38608421363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/603ecc45-1d50-4863-804f-8b3f932c3a23/xazoxotebinuxemumal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/420b6ad2-8f01-42ea-868d-f0dc2fb749f1/2556745527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8ea44a-e292-4e14-a955-40d94952acb4/the_shark_and_the_sardines.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20834 5592 bytes
SHA-256: 8cf1342907c546b6138146a376dfc5a4f607b856a56a621ebc9100748b953006
font_01_sfnt_off00021b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B27 14480 bytes
SHA-256: 014586d1a205f46ac0447bb020f961bd2bf1385fbbfa01f242ff9f7df863140e
font_02_sfnt_off0002479b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2479B 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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