Malicious PDF — malware analysis report

Static analysis result for SHA-256 e511e4495376bd98…

MALICIOUS

PDF

77.6 KB Created: 2021-03-08 20:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a76e1f7d75ae95a56f27e4deca351bf7 SHA-1: 21127e41227e3a5fd4abe94f2aa9388e8d79b721 SHA-256: e511e4495376bd985bed8701189dac62b82efa5ff702d0189089ca3d6734ef52
186 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 0.9988

Heuristics 6

  • 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 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.
  • 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://maypoin.ru/aws?utm_term=panasonic+es-la63+manual PDF link annotation
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/sukataw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403406/normal_600414f74b57d.pdfIn PDF document text
    • https://kuvinonufero.weebly.com/uploads/1/3/4/3/134307364/wosej_fopajufiref_zunelorusabar_xajajakete.pdfIn PDF document text
    • http://creampiepow.club/27563006024iito0.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/4890252.pdfIn PDF document text
    • http://septiki-rf.website/2005_cadillac_cts_engine_3.6_l_v6rdwv9.pdfIn PDF document text
    • https://xasuzetevoke.weebly.com/uploads/1/3/2/6/132681443/fepuwojolumubiwawiv.pdfIn PDF document text
    • https://ponixetuga.weebly.com/uploads/1/3/4/6/134668384/1415070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494149/normal_60145ae76a5e9.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/wazisobukerefejoves.pdfIn PDF document text
    • https://lisevududotuwak.weebly.com/uploads/1/3/4/2/134265384/b202503dea00f.pdfIn PDF document text
    • https://rekazisiw.weebly.com/uploads/1/3/0/8/130874265/5724876.pdfIn PDF document text
    • https://wemuxafav.weebly.com/uploads/1/3/4/8/134860001/7e966093dccd2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410986/normal_6002d7d93a76c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373505/normal_5fe9bbf961f7e.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://s3.amazonaws.com/pazovugal/vebizofu.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_528b42a2d3ef4db4b39023817fe1f508.pdf?index=trueIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_f77c62d0d9a54da8ba2e56766a382be2.pdf?index=trueIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_1db499dbb61542db8a324a743211ab15.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nabifovu/falcon_7x_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/monster_hunter_world_insect_glaive_progression_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/56292495002.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_532073b7b1e541e28671f4cb89d75122.pdf?index=trueIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_3e9212dd323d4ff0900bfeebb8b8ccf8.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FA 5004 bytes
SHA-256: c264c6052e959807b99012e0094cb4a1ae03535c2fc184b31dc665ec1c04b45a
font_01_sfnt_off0000e8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D6 15496 bytes
SHA-256: d6acd8fa9086f895725323a7b1f391b677a29f0fcbe0d60cbc4e9e83fcb49655
font_02_sfnt_off0001185f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34