Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1129cedff9fb94…

MALICIOUS

PDF

71.4 KB Created: 2021-02-25 23:07:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0f427854f9608774256ce3b0c3e24826 SHA-1: ef11b6b3b8767b795c1f02fbf785c8339c8988ec SHA-256: 0b1129cedff9fb94b5bf33656546ea4bdf8579bf0ed84f08928c83940f0c87d1
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=edtpa+definition+of+central+focus PDF link annotation
    • http://mowilobo.22web.org/80003189266.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/b95a4a.pdfIn PDF document text
    • https://gakikodokuni.weebly.com/uploads/1/3/1/8/131857060/8c34bb50f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453888/normal_5fc5f47fae31d.pdfIn PDF document text
    • https://pusetuliv.weebly.com/uploads/1/3/1/6/131607438/537655.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446026/normal_5ffb89a6c26db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385421/normal_6001ee2ada27a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_603368b04aa05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376375/normal_5ff4cf94acf44.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/tinivukedeta/appozhum_paranjille_poranda_poranda_song.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/vuxomizudabipabixo.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/find_accident_report_by_vin_number.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/53995966907.pdfIn PDF document text
    • http://gafodix.myartsonline.com/bartolome_de_las_casas_important_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/gejepodedepekuse.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/53145530910.pdfIn PDF document text
    • http://geperazal.epizy.com/batis_aramin_room_rates_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/44097518646.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_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 5108 bytes
SHA-256: 952d4bf1b47e81174369f22e15037758b1b58ca145fadfc56a9ccce3de84091f
font_01_sfnt_off0000ecf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF4 10460 bytes
SHA-256: dc9118b4873c4f0c1309ac8b5b7efcdc1e2be7a79daec6803e3e5c621aeea136

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