Malicious PDF — malware analysis report

Static analysis result for SHA-256 544620eaf57acdb0…

MALICIOUS

PDF

85.4 KB Created: 2021-06-30 11:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8f1dc7abc56a5a5853f95c174c69f9db SHA-1: c56b8ecca467a115425c8e7ccdf7ce53eb4b56d3 SHA-256: 544620eaf57acdb0ead38edd73c5e6a9d2be7014e57d3fded5606881de8b136a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous compromised WordPress uploads and disposable hosting sites, likely intended to redirect users to phishing pages. The embedded URLs, such as 'https://smidgel.ru/uplcv?utm_term=hack+money+call+of+duty+mobile', suggest a lure related to gaming or financial scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://smidgel.ru/uplcv?utm_term=hack+money+call+of+duty+mobile PDF link annotation
    • https://vansuloi.com/uploads/userfiles/file/33657345453.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c934e81c2d---dirivufolisiwomazobifif.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbc7cf135d---zazurijapedi.pdfIn PDF document text
    • http://zuestag.ch/userfiles/files/17029735318.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/8270884b3777d829076cdd6805521a01/33295440488.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/35805131449.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16072f13c5617b---93628515364.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/fbb81928606580d68e0e27c7e0804143/fawox.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/belazaxegekirufavojilan.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/wokoripufajikatijiziwiru.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/42826647795.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/0998a00991a4efce1d85efcafef68c3e/14141538291.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a93e76b76---69228485883.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/lalupomagifixu.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609be7d9f0a7f---36295403637.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4589b7b456---48794898030.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/3827657804.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/pulifed.pdfIn PDF document text
    • https://digireg.it/upload/95614224413.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a934e52fbc---gibitobununibadak.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/najono.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/xemakiwe.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ek281jimsfdnfuv7iq21epo86l/wufopisegorimawif.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95dff1bb41---darubaluvepugevaduwage.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_off0000eb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001033c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033C 10808 bytes
SHA-256: a3460867a747b4d91026ea5ed959b4e402e3b2cc87a76fbec20a442296907485
font_02_sfnt_off00011c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C14 16952 bytes
SHA-256: 826107e65713d3bc208c58038ece49d8a225b11ef43652ed94f5f70890e6b0d2

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