Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ea725e275a258a…

MALICIOUS

PDF

77.7 KB Created: 2021-09-13 02:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 933fa05af2ecbbe9a35ee7edbd26abdb SHA-1: 04b48e0355a6890903b72ace7b4b04a694a16dfa SHA-256: 03ea725e275a258a8b62fd8584e788ff09389287cd8803e38b12bd4b985062f5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs pointing to disposable hosting, indicating a link farm designed to redirect users. The presence of embedded URLs and the overall structure suggest an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://allytemp.ru/uplcv?utm_term=how+to+use+busybox+commands+on+android PDF link annotation
    • https://ashasuchikala.com/ckfinder/userfiles/files/10719424314.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/30597066163.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/pezavusobitogoxedanawebem.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/19483313171.pdfIn PDF document text
    • http://esangsok.com/upfile/files/nubejoraxewenikudobalubu.pdfIn PDF document text
    • http://zuche0551.com/upload/file/29085884939.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-13/20210913070655297719.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/75116430816.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/litabupevodegakulevala.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202109050542072697.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/83443624308.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/161358122d38d0---funopib.pdfIn PDF document text
    • http://phongthuyphatloc.com/luutru/files/66245768003.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/kio2827lb3ish9rttut3h765s7/susatozegesexad.pdfIn PDF document text
    • http://jr.ac.th/ckfinder/userfiles/files/rivaranaxinufusukukoju.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/losejonovixitebewonukazi.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/tofuj.pdfIn PDF document text
    • http://esejsc.com/upload/files/pisovopenetexekisapodumab.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/jenigeziz.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE160 17780 bytes
SHA-256: 2332f2dc16c9b6ba04d4bf69cc792ec5b258e2c07b0dcd8ccfe9f913a4c201aa
font_02_sfnt_off00010ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF8 11016 bytes
SHA-256: 1d773ed9b76a6f0fcfe559a43cec692771b52082079fbd698ad74c14ddd05669

Open this report in the interactive analyzer, or submit your own file for analysis.