Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fae60aa4127dc94…

MALICIOUS

PDF

84.2 KB Created: 2021-09-18 00:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 13a18b03f5280f53cf5373ef66a702ee SHA-1: 39a0329a8c451a441499710d3545ecf8a05eecea SHA-256: 6fae60aa4127dc9471613a84adae2e0aedc3068329d8b0490b9776f119dc24dc
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the heuristic findings point to a malicious document designed to lead users to external, untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://biurod9.pl/public/userfiles/file/bikideve.pdf In PDF document text
    • http://seritour.com/rsm/files/gedibizesof.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/66968322998.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/xuzebeweb.pdfIn PDF document text
    • https://cansandientu.net/Images_upload/files/nifogibaxisatonidad.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/zizoliwegupura.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/96367754916.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/nijugo.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/navogunujokezevix.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd86a09da6---senuzudoduradarewofuvanu.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161450453b18a0---xanusenawaladiduxasufore.pdfIn PDF document text
    • https://eco-translation.ca/upload/editor/file/4502005880.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/fokunirenupeduwolazo.pdfIn PDF document text
    • http://archbot.pl/files/file/guworomusefibeve.pdfIn PDF document text
    • http://envigest.cz/upload/file/wamoradejupapanasesa.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/41920187974.pdfIn PDF document text
    • https://nexapos.com/upload/files/ripobo.pdfIn PDF document text
    • http://phamtrangia.com/upload/files/bagewi.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/xezamika.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/16913270993.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/d3cc0150ddc642d73796a59a63193fab/16006265691.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210909075044.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/45865362729.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/27074275671.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=movie+sub+indo+apkPDF 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_off0000e595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE595 17932 bytes
SHA-256: c52705cd29c28af9e2e24356c3f115850c09afe4bdd8bd59f6ebf126eccf5663
font_01_sfnt_off00011372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11372 10532 bytes
SHA-256: 7669beb8b59abf72c0bcab27546fbf97ea590b1e8e7ace03a805a776cd2ffe36
font_02_sfnt_off00012b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1