Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7e296eb907c43c…

MALICIOUS

PDF

82.1 KB Created: 2021-04-28 00:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 349e41d3cc0d7c96bbc8d25bd1c118e0 SHA-1: 532e38b64ae87a3fe532b9096e66e2a295ee4431 SHA-256: 1e7e296eb907c43c6e6cc18348b24a7cd14d8e4c00d106ef5014951d596dded5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to S3 buckets and other domains, suggesting a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as a phishing trojan. The embedded URLs, such as https://kuzutuzo.ru/strik?utm_term=are+safety+data+sheets+a+legal+requirement, are likely used to direct users to malicious content or phishing sites.

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 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://kuzutuzo.ru/strik?utm_term=are+safety+data+sheets+a+legal+requirement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408984/normal_6028084dd10f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449605/normal_605648641018f.pdfIn PDF document text
    • https://dovasivenumi.weebly.com/uploads/1/3/5/9/135965427/rugolimek-naroxexozaki-zobovos-sodereko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401519/normal_5ff923c28ebf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_60172964a035d.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/bipijebewageb-sabedox-benadifik.pdfIn PDF document text
    • https://zudamuberul.weebly.com/uploads/1/3/4/8/134854759/bexoliz-wetefigulozi-tavagojibes-fupapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_603c7ad0ef69f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405430/normal_6035cedc19482.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/kuboki/neumonia_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/6209858087.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/how_to_replace_a_magnetron_in_a_kenmore_microwave.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/tinulubisatovas.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/94474653433.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/timesheet_calculator_miracle_salad_time_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/4239042247.pdfIn PDF document text
    • http://buvafejeles.rf.gd/car_spare_parts_name_list.pdfIn PDF document text
    • http://rozazidugo.epizy.com/asio4all_fl_studio_11.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/ewg_cleaning_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/tableau_advanced_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/jazozubiwuxivavoviguduvuz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 5308 bytes
SHA-256: 36954bb363b05510e965ccc845bd2242db137e4242eae3e9bf5ee7aa13c9b898
font_01_sfnt_off00010856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 10572 bytes
SHA-256: 9f78c97882eb1d8cc2a6b2715290cbb07c4929db5ce4e3395a9672a987d08df3
font_02_sfnt_off00012c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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