Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1d25c59a2131b7…

MALICIOUS

PDF

80.1 KB Created: 2021-03-12 17:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0401b4bf82fda6842274f26cd69a9d2a SHA-1: 11a0e3f5ea39e4664036bc4c917ded5f1c0f410f SHA-256: 1b1d25c59a2131b76d86ddfd49911a64028c82673c44d3f4816d2efff9893028
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://botokaw.ru/award?keyword=case+study+research+design+and+methods+robert+yin+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495241/normal_603b7a655a42a.pdfIn PDF document text
    • http://garantiya62.ru/suwasateluwitiyx4m4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388824/normal_5fc7df99e302c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_5fe6789536bf9.pdfIn PDF document text
    • http://meetsol.xyz/60861553619wtgeb.pdfIn PDF document text
    • http://haifaiv.ru/is_ssr_good_for_stockskb901.pdfIn PDF document text
    • http://xoxibusu.iblogger.org/sapasuvasidebotilexala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500904/normal_6017b207103ae.pdfIn PDF document text
    • http://eushopvmn.site/36514653153iaqd2.pdfIn PDF document text
    • http://pay-order.info/el_toro_ferdinando_libro_wikipediavi14i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5fe8e6d28cb23.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://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_9cbd8f8434b449c49ed091098d034fd3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jigezilor/61058609730.pdfIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_d6c84fcc55b840b9a4692562bddf2878.pdf?index=trueIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_d9931fa6606d4608bc2caffc7f1148e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/is_ch3cooh_a_weak_electrolyte.pdfIn PDF document text
    • http://winenezufu.epizy.com/20091626714.pdfIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_11a0795e1a564a3fb2d5a6d29a8add13.pdf?index=trueIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_e8268b12f0d44f6d9ef10573cd70465d.pdf?index=trueIn PDF document text
    • http://farujage.epizy.com/chin_hin_group_property_berhad_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/nebanazadu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA94 5684 bytes
SHA-256: 2ae7d70b208545c368f0bbc028ff7f7e98d99f6a6620d581d96da796bc00ea52
font_01_sfnt_off0000fdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 10888 bytes
SHA-256: ea170ec43bc3e5a0786a194f19ad45f72ed6070f3e3a9a591a52ef8f4fac3564
font_02_sfnt_off000122e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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