Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ff982afac572aa…

MALICIOUS

PDF

85.8 KB Created: 2021-09-16 18:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1046349eea18888730e2480c8ef383e9 SHA-1: fda79273a54cba54ce06d3ce115fe4968cf05b93 SHA-256: 99ff982afac572aaaae5a213f539bf37b087715e55dc71af6aa1bd67154411f9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be link farms or disposable hosting, suggesting a phishing or redirection campaign. The PDF structure and embedded content indicate an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://oniceh.ru/uplcv?utm_term=lego+jurassic+world+play+store PDF link annotation
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5cd5b84f8---ropixivadixufag.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/72837558484.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff53e81672---28043357074.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/63186514346.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/tarozabikapa.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/gokibonokoxewi.pdfIn PDF document text
    • http://jn-zhsc.com/upload/mabipowewenimarixe.pdfIn PDF document text
    • https://kangaroovietuc.vn/webroot/img/files/rotejobonowobuwejedur.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcead0ef01---sosupejat.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/tafibituwojifuxujogoxim.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/19134178229.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/54539568846.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/roduj.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/29407263850.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/97615525075.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/10853369197.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/10961440142.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/96430305542.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/39367024523.pdfIn PDF document text
    • https://calson.garment-pro.com/ckfinder/userfiles/files/jofonabonazarotinununis.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/8693579621.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/lofesoxiwepebodafofewisiv.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/wubepupe.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/612fcb4ead1b1.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/13344656802.pdfIn PDF document text
    • https://venus-forever.com/image/files/tegexogafibome.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_off0000e60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE22 10972 bytes
SHA-256: dba829243d15f9e993266406aaad6b072602737ce1a7d23d13aad3212f35a01a
font_02_sfnt_off00011792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11792 19164 bytes
SHA-256: 5fb06698cb3c020aeb4a17324fe75b50bd309f8b10c4c99a5d8feda55af9f8eb