Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7ef61d57c45d96…

MALICIOUS

PDF

84.2 KB Created: 2021-07-22 15:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 5c5588210af4720a0869f7c8d17f6f68 SHA-1: 444eddd9df99e9e0ff3c75b72d424a87d0433fae SHA-256: fe7ef61d57c45d9699b5b663c60a57799e2e1fdff7877ef42694b21f48d74a5b
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits social engineering tactics, impersonating a cloud document lure to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, many hosted on disposable domains or compromised WordPress sites, likely serve as part of a phishing campaign or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://artasedanasingaraja.com/uploadfck/file/fupejagazokoxoxunapowil.pdf In PDF document text
    • http://stromzeleny.cz/file/61437792812.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/27bbceddb6d7360b930bd707f59f258a/novadejizezujujebimov.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/meledusenotakesumezaxasu.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/uusntg9a88ole49m8pqqtvhega/zivinoseniwixipalezale.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/970ae4e6953039d6733daefd73b4cd92/61355449559.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/bf90147fdf0fc0010068f3899d3d6662/dawoxorobagotiwir.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///6448579261.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac86364f8c---2111264434.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/jutibudejoxoz.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/36920e23414fd967bb4c532e484a1ef3/salamoxagoloduroguk.pdfIn PDF document text
    • https://eagle-aviation.com/userfiles/files/mikiw.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/84604467374.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/fagiwixadotu.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/48262643153.pdfIn PDF document text
    • https://go2germany.ru/files/file/dulagarumuvafag.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/zejenolobavodisetudo.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05271ed349---83068149152.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/visejazuzowururefime.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/46179598655.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/gixojasojitiwibalulu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=pdf+preview+handler+for+outlook+2010PDF 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_off0000df1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 18952 bytes
SHA-256: 7ae4bb3844bda94d6304e8820fdad42ddfd66d6631072895e3685e77823955ae
font_02_sfnt_off000126ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EE 11068 bytes
SHA-256: cb40c51244a03e3fe169a1055be34765c1df53588d8fbc4d8c5dc116fcaa377f

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