Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32a9c0de20ac9e8…

MALICIOUS

PDF

88.5 KB Created: 2021-09-24 10:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5e029b915b504a3b9c4e91402405a674 SHA-1: d452cd2b9000cf2e20275cc22874f51527d0b39b SHA-256: f32a9c0de20ac9e891269e9f19a5bfdc8736c142aacdbf17ac00c7ad254f6b8e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload storage locations, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ijtm.in/userfiles/file/bufamusalalesipaletisex.pdf In PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c346e9e279---bamolawufejika.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/28937813669.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/didil.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/goxapok.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/zujam.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/ledeburovunatagawobi.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/xilexezuzedegajaxabe.pdfIn PDF document text
    • http://www.nena-artspace.com/ckfinder/userfiles/files/gumutagukat.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614bc0a71b6c2---30151077410.pdfIn PDF document text
    • http://bio-scan.com/userfiles/file/roluvagomosubotala.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/4spqdi0gv9prb747980tsoej5c/43614150720.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/46468299819.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/a12f2fae7a692aabfded326238980f94/65501105959.pdfIn PDF document text
    • https://migger.dk/userimages/file/guxujaziwegasokibixak.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138677cf356b---16203139931.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/86523078766.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/26794745667.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135682488a44---fenifunakozosusupene.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/87960619954.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/98054727683.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/27048997182.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/3480334242.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=apk+mega+iosPDF 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_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 19264 bytes
SHA-256: 99c28a856a4d734a66ee7e1abecfcdf05637ef90ab45395bae31a8bdc36cf039
font_01_sfnt_off00012518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12518 10320 bytes
SHA-256: 6d19d6a74219ee4c39e358fe026fdccda83d0f46333ca5108b1c0ec1b7df003b
font_02_sfnt_off00013c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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