Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44816122a92546c…

MALICIOUS

PDF

92.7 KB Created: 2021-08-05 08:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: af87a126df4f140aabd8fa109eddf866 SHA-1: f841597813eebedcbb347df1a7bea3ac7ae6ca7c SHA-256: e44816122a92546cefddc40b7d7f77b820a5c5d810afc21cd32662a41187ff48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external URIs and embedded links that point to compromised CMS upload directories and disposable hosting domains. These links likely serve to redirect users to malicious content or phishing sites, constituting a link farm attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=butterball+stuffed+turkey+cooking+instructions PDF link annotation
    • https://dacsanmyhuongbeti.com/app/webroot/files/images/pages/files/25208339675.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/mamudovimotuganuro.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/0ec3fa545a7a05cc104fb8b1a616f6d5/benerolaxi.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/10417501407.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609850359f7e4---xusexijudusudolorejoni.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/43079895891.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/fufagudipevokebifinuta.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/68204513865.pdfIn PDF document text
    • http://cartopack.com/Images/file/bimazuwaxip.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607b376d0a90b---41139224948.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f17bda46fe---21040685433.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/moxamevuz.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/pofunax.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/fc2be9a2fed4704218ff537ff5b2f1d3/jisisegilobomoxugutom.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/vevuje.pdfIn PDF document text
    • http://asahiru-ban.com/files/files/36586098312.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c605bd4bc---vasumulovugipis.pdfIn PDF document text
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/96572870784.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/rutajebitulozetimunukivu.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68b9850964---4054036307.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609827187c1c9---20124717361.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/69964774552.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/sopavugajugu.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/86621406190.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_off0000ff75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11787 18932 bytes
SHA-256: 36df04222a1b3984b001a1f50cf1745364ef7d7fffa469dea8b4fc50120ee2c3
font_02_sfnt_off0001498f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1498F 11152 bytes
SHA-256: 9f8ab48fadc755c1e2b9b2a9b75d37c51b7212a632c3a645306a7e9d2c72ae24

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