Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab01b730149ca553…

MALICIOUS

PDF

84.9 KB Created: 2021-10-20 21:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: a4756c4afe028313c36ba895546f3239 SHA-1: 6c0a113e70260589393e8a02fc89371136b7bd94 SHA-256: ab01b730149ca55380d8e47e8b97c38ba843a17ee1052f55b5bad745c00504a5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external URLs, many of which point to compromised WordPress sites or disposable hosting. The high number of links and their nature suggest the document is designed to redirect users to malicious content, likely other malware or phishing pages. ClamAV detection and ML classification confirm its malicious nature, indicating it's a phishing or trojan distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://smidgel.ru/uplcv?utm_term=describe+your+character PDF link annotation
    • http://aalzkj.love-mrt.com/upload/files/tokexeripapuxelokeri.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/kisosavetovemusokipile.pdfIn PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/53486115087.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/vixamijugesexaxiwapud.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8fb9041c3---28831646578.pdfIn PDF document text
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/luzokoditozezoduxatozad.pdfIn PDF document text
    • https://angkagenap.com/contents/files/tozazodefakidezurenufevon.pdfIn PDF document text
    • http://netpost.vn/upload/userfiles/files/rilofogimetakujesururotuj.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/xoraleweliwezerajewodul.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/6552d59d0473e5178e91bbf9929da653/temamapogas.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/13800876844.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///42325541790.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370e24f32d9---93628454599.pdfIn PDF document text
    • http://protezas.lt/i/File/xobuloradozozaz.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/26867708361.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/sivegobuxulobirafi.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/28bea10a92a8f41255c5b7efc9c93e8d/96894255536.pdfIn PDF document text
    • https://www.piramideidiomas.com/ckfinder/userfiles/files/53036786654.pdfIn PDF document text
    • https://majubesar.org/contents/files/75498864616.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/2lo0qudnkci1u92ktbp6vn4g85/30542498910.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/guzitaxu.pdfIn PDF document text
    • http://riverla.vn/uploads/userfiles/file/46426980765.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/nusuvonukuvumus.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202110091308022102.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1616ae6da57e96---magox.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/fetorej.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16153a139850c6---12071164753.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_off0000e22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 10532 bytes
SHA-256: 5c3b400f2c983b4269a987db84977f572f67d0c0994d3836f2143c6443fdbae8
font_01_sfnt_off0000fa66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA66 19620 bytes
SHA-256: 5695798971e1586b3ff67a186e59ec4f9aae0e457b915fa49e7b128dd7a5930a
font_02_sfnt_off00012dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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