Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5131d18ce72b25e…

MALICIOUS

PDF

68.5 KB Created: 2021-09-26 10:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4c0794e3bac210e02543ec0da62f5ce3 SHA-1: ade7c8c15f45506800ee6793c53d23bdfe1622b6 SHA-256: e5131d18ce72b25e096720427d5c71bec1f5cc65696870544661a6f0f0c649fe
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only document with a click-outward action, typical of phishing lures. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://globaldreamindia.com/webcms/file/lifoledogeveto.pdf In PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/63556167235.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/78000215873.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/7153092737.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/bolopojimasik.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/13280485545.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/68105776326.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/dhkk2sm77p7ch8t5t9e2tnk39l/60905839919.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/85338456341.pdfIn PDF document text
    • http://lycee-elm.info/userfiles/file/kademanogax.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/zipurug.pdfIn PDF document text
    • http://irs-messtechnik.at/upload/tisabituf.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/gifemukumeponokel.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/87268930159.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/bafewitozexizu.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/fenamidiwu.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/lic22kbs4u6v50gac0hh4vbeub/12457493298.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/teweripozabapem.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/matetasifotosum.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021090802261873499.pdfIn PDF document text
    • http://tattooindex.nl/images/uploads/80419825755.pdfIn PDF document text
    • http://slhospital.com/upload/fckeditor/file/rinulafizewupopuriwife.pdfIn PDF document text
    • https://membermimpi.com/contents/files/1376500496.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/36962034330.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/10215897788.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/36606585963.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=crestron+android+appPDF link annotation
    • 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_off0000b04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB04F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC861 14932 bytes
SHA-256: beea913275ffd6a2e6ff623cffba3357dbb81e3e78dffdfa8099f09a18575b70
font_02_sfnt_off0000ed35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED35 10368 bytes
SHA-256: 6c4cb76d7fd78fa5e4db76b9f5d0dc97679291c17cc982b99697935616e2458b