Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d165ed3b917241…

MALICIOUS

PDF

79.0 KB Created: 2021-09-13 04:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 89f747c857f3b132862a9b9101877b68 SHA-1: 76d79bdeb04f556893da17b46bb14f69a491bd77 SHA-256: 19d165ed3b917241ee77f92a8fb6c5baa7b44544dae78da2fc4de6af00f26bdf
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 identified as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting, indicating a link farm designed to distribute malicious content or phish for credentials. The presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=how+to+stream+iphone+to+android+tv PDF link annotation
    • https://landtop.com/filespath/files/20210904031314.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/xowisifo.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/peraxisomisomomun.pdfIn PDF document text
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/26002342179.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/gevonatexevuxekajenagu.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/2209427246.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/saxedifip.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/metizegedulovuxovalokedez.pdfIn PDF document text
    • http://maksimetall.ru/files/tavabenazan.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/25132261920.pdfIn PDF document text
    • https://eric-parnes.shortex.com/ckfinder/userfiles/files/joserinoponamunapal.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/xivebugirosiruxufete.pdfIn PDF document text
    • http://ibb-online.ru/f/file/54439408134.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/50942641852.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/solizor.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/mifezojusimomilebama.pdfIn PDF document text
    • https://dp-silver.com/userfiles/file/zimeridit.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/lajolidojarefexikaguvolav.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/sosefenil.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336e5e848c0---fitux.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/73508566653.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/37292339647.pdfIn PDF document text
    • https://umutfm.com/resimler/files/neguzosomi.pdfIn PDF document text
    • https://edgecs.com/documents/vinanixarebogajila.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_off0000d2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BC 10752 bytes
SHA-256: 4831f499978f7302c62c0790019ec8214b97051aaef3014f45af70e37d44a696
font_01_sfnt_off0000eb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10362 16668 bytes
SHA-256: cc0161e59e1cc21233173ed1f18a12365c5cfc80774c480a1a384ad75c9bfe05

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