Malicious PDF — malware analysis report

Static analysis result for SHA-256 56bdbce3a9d1f710…

MALICIOUS

PDF

109.8 KB Created: 2021-09-04 23:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 45e8d019c00bd8dd478187e2b00e912e SHA-1: 2b987cafaadf7aef28fdcc871de1960fe1608fee SHA-256: 56bdbce3a9d1f710815d360ccddd43d3ba4b1b961ae8c937f096f452c264e446
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of external URIs and a link farm heuristic indicates the document's primary function is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://garglob.ru/uplcv?utm_term=univadis+manuale+merck PDF link annotation
    • http://jafra-com.at/userfiles/file/dofonexabozuxuxibom.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ff33b6b1ac3---10129085506.pdfIn PDF document text
    • http://fitviewer.info/files/file/gigakenuboletuzobolomona.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/pifonodanurowu.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/sunosilakov.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b3d95d21bf---84943798898.pdfIn PDF document text
    • http://zzps.pl/userfiles/file/podej.pdfIn PDF document text
    • http://skyparadisecoffin.com/images/media/files/nojubewuwefofamepix.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/nagipimogegi.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/govoredikapuji.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca6d9ce46e---96674231619.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/zenofono.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/lipebezuvoriguveva.pdfIn PDF document text
    • http://agavietnam.com/img/files/nodabebamiruxisedafikipa.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210701_165158_3454.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/90458238559.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a50d328d1---31432694751.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/60148567352.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/wadumarababu.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/cdne7r2tb8sj2veoslp68974iv/rijujetulorisejabirosul.pdfIn PDF document text
    • https://dd-inside.de/userfile/file/xelali.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/gsft7q6g0n3vblbaj6cnmu2ujb/68043837357.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5575edf43---25219272058.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161247edbac5c9---76847868725.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b81327865a---48299714972.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_off0001445c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1445C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C6E 20060 bytes
SHA-256: 1984425392667448ae251aa2160295d51e1f35f24c682d11980119d53b07a382
font_02_sfnt_off0001919b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1919B 10580 bytes
SHA-256: dc1b0a6b5a31c999af88627e9fd3d886d81539188614a4f9b31045c645cb6846