Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb85a9e319d3989…

MALICIOUS

PDF

82.1 KB Created: 2021-03-25 13:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: fd266d59a1e2227967a69e37e63734d4 SHA-1: 925fc2865b092da9c81a2f691409992a52690890 SHA-256: afb85a9e319d39899ed4334a10c4f8787989e5484e13013556a5a9d2bf6214d2
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external links, with several pointing to disposable hosting and potentially malicious domains, suggesting it's part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata related to its creation, which does not detract from the malicious indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://xajibur.ru/award?keyword=2020+calendar+with+assam+holidays+pdf PDF link annotation
    • http://saniwofixapu.mygamesonline.org/jepofunuvigunexoju.pdfIn PDF document text
    • https://fazipebafutemi.weebly.com/uploads/1/3/1/8/131857540/lunar_wenuxo_gepef_jifoge.pdfIn PDF document text
    • https://mebugiroxubo.weebly.com/uploads/1/3/0/7/130776511/8b1d6af.pdfIn PDF document text
    • http://namabal.scienceontheweb.net/fuvorosasudis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_600b4d25ca564.pdfIn PDF document text
    • https://rofikilidoxomuk.weebly.com/uploads/1/3/4/0/134017179/4798843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393911/normal_60383398ef28c.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/mumuta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_60200278126fd.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/govaf.pdfIn PDF document text
    • http://melowimaz.getenjoyment.net/el_escudero_de_dios_descargar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470535/normal_602ad71a3f6b3.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/water_crisis_in_cape_town_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fekife/how_to_use_nikon_d5100_camera.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/bozidu.pdfIn PDF document text
    • http://furunes.onlinewebshop.net/1173841197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9858840-96d0-4cd2-8099-e3fb0a412eb6/56488732069.pdfIn PDF document text
    • http://lojubefogugiku.onlinewebshop.net/88803701274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1791aa3-9cd8-4c95-9989-c8f9176b7fc3/84917617385.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/jogos_gratis_para_baixar_no_celular_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17d466f-3ab1-4f2d-95aa-55b1aaa75b90/93011215651.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/pediridagurarolu.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/12813916701.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6E 5768 bytes
SHA-256: 87ee2eb5e9d30f9e25d72ca756f812659a3bb20eea92da9baea3c42782a196e0
font_01_sfnt_off000111fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FD 11496 bytes
SHA-256: bc8fdc523b10ba1bddb82061d57ae256a8bb6fea7415dfc4710a8469cfc3a883

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