Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b54deae8b3f0b3…

MALICIOUS

PDF

71.3 KB Created: 2021-10-04 05:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: fb344efab90840a4061c7ceb00206365 SHA-1: 4fa298a004f6651d403ccf61970832810440073b SHA-256: 38b54deae8b3f0b351fff77216eedc1b730152fe2b4dece36c903be530753f37
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The presence of multiple external URIs and a link farm structure, including links to compromised CMS uploads, strongly suggests a phishing or SEO manipulation attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=average+annual+power+consumption+household PDF link annotation
    • http://briquettemachinery.com/d/files/29507171060.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613488dc0722e---51381027963.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/95e0ad9798dff83c0e25987caa8e8f2e/17486987029.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/tatofuluwanubumar.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/6534326779.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/19971341625.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/3den73n8aknh1ntcktvt8rrc7v/75364112786.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/37028906841.pdfIn PDF document text
    • https://maciejabramowicz.pl/upload/files/file/84378492572.pdfIn PDF document text
    • https://whitepalacegrill.com/userfiles/62600669437.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/mozunibajefaf.pdfIn PDF document text
    • http://jiji.pgo.tw/pic/uploads/files/lewazepazuxuguzanaxemo.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/nusalamate.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/1070821930.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/basalib.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/tanizezuduwurojaz.pdfIn PDF document text
    • http://xn--2e0b30g3uq7pay7m.com/upload/fckeditor/file/xiruzopefa.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16136b46ff116c---93050821596.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/s42d9t67fah0v5n3o50ihtdinp/49437123584.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/mawovale.pdfIn PDF document text
    • http://indexone.ru/upload/file/78022037518.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/33412750941.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/22627484447.pdfIn PDF document text
    • http://fitviewer.biz/files/file/suserexisabajedomu.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_off0000b307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB307 16764 bytes
SHA-256: d8389f3a0554dafb8283401555d57842ab1af3079ab03c19055a5959f5d7e14c
font_01_sfnt_off0000ddce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCE 11192 bytes
SHA-256: 9b618e1b0540fce933bfb11c3d342c6681aee42cebf07782c1dfc0eb4ceb5584
font_02_sfnt_off0000f7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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