Malicious PDF — malware analysis report

Static analysis result for SHA-256 53036b94960552f8…

MALICIOUS

PDF

84.9 KB Created: 2021-09-13 03:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fa124e8170d35a2873e8c918b6f5154b SHA-1: d29ab373ec3d6e45dbf7efe31705134ad0ed574e SHA-256: 53036b94960552f8eb3254d229ff00384cc863076882bc97f2fd40c239b78f9a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample is a PDF document that exhibits characteristics of a phishing lure. It contains multiple embedded URLs, some of which point to compromised WordPress sites. A critical heuristic indicates the document instructs the user to copy and paste content into a command-line context, strongly suggesting an attempt to trick the user into executing malicious commands. The ClamAV detection and ML classifier further support its malicious nature, likely as a downloader or initial stage of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0d8ed63c7---94609389858.pdf In PDF document text
    • https://abcoegypt.com/userfiles/files/ruxobuvazanuvew.pdfIn PDF document text
    • https://sharenkon.com/files/tasojuz.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/72160496827.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/kisekudexupiwafiwimon.pdfIn PDF document text
    • http://leguido.net/files/38655375957.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd3a361767---fifujij.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/motoxi.pdfIn PDF document text
    • http://jnejendomsdrift.dk/userfiles/file/84498142279.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/61249161888.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/30702416826.pdfIn PDF document text
    • http://datacomsystems.cz/userfiles/file/8690954032.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/zilotojewifopi.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7029cbd80---vovowajomokakejatufenubam.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/resofigaf.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/xogug.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/53399798620.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/6611076646.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/62161089028.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f69a0ee597---94918601538.pdfIn PDF document text
    • https://limsurempat.com/contents/files/35280827154.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/rilokimogilijekebitedidif.pdfIn PDF document text
    • https://stancijanegrin.com/userfiles/file/67492288664.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/30492056550.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210907161529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+install+apple+tv+on+android+tvPDF link annotation
    • 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_off0000e775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE775 17660 bytes
SHA-256: 07ca48beec7537ca5e359b82696882f3b9426fac400795ce929e3d72069c549e
font_01_sfnt_off00011573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11573 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8A 10528 bytes
SHA-256: 207bb0459b96595d25ec6fa6ad08be47db4000d464016af6dace960f74358cb9

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