Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5d18bf744850bb…

MALICIOUS

PDF

82.7 KB Created: 2021-09-21 10:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0112cbd382dc85852bea241a8723ee14 SHA-1: c6a6b947d9d8b5bcfae8e3a5e434d703a4a31973 SHA-256: 4c5d18bf744850bb76a146813514e110c9d3f1bf58cc16a59b6573eb9bee6c5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The presence of these links suggests the document is intended to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=moral+tribes+pdf PDF link annotation
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/51629795389.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132cbc8cd18a---78512957250.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/58764616911.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/5620139936.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/86897540449.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/lidozepejawinapuzezew.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/bl6bjkdp3k4b3j3kehrqidttnm/59407706212.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/20095051196.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161448a65f111d---36787205788.pdfIn PDF document text
    • https://pre-www.bridge-academy.com/uploaded/ckeditor/files/6073622191.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/74722728360.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/aiqbaoc8ai0p9ra0gactgs3mcg/32095040545.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/80894053806.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/sovedidimodugi.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/08g5bb8jet5b6vl224saub2tsh/nunesolesipoduso.pdfIn PDF document text
    • http://nattukoottam.com/userfiles/file/dujijufuwixetisim.pdfIn PDF document text
    • http://stroykap.com/application/views/stroykap/userfiles/file/41558309099.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/12703125076.pdfIn PDF document text
    • http://abpaluso.com/upload/file/voroxupetimaw.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/wivimosutabarawutut.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/nefaj.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/809dfdd63842d800a0189e7cb60b6d71/matetu.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/38737378721.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/6bk0bi44n36qda9f8vfpkptlds/puxemajaxojizop.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/44732304712.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/ruxixakevamesitusagoxun.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_off0000ddd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD5 10520 bytes
SHA-256: d91f112f7922cfba8928ba495fe90b1892f78c4b648bcdb19291cedf87843c6e
font_01_sfnt_off0000f5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AC 18288 bytes
SHA-256: 5621ceb6e6c362e1f2a4947b7bc3ba4fa948293197a180836549a1ba60405862
font_02_sfnt_off00012512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12512 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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