Malicious PDF — malware analysis report

Static analysis result for SHA-256 df474031f7af7146…

MALICIOUS

PDF

90.7 KB Created: 2021-08-30 18:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 441e91efd1bf5e5b3fcc1280d500d2dd SHA-1: da6f188a1acf6673b3e3f0f358b7c1dccc312295 SHA-256: df474031f7af7146b3806264e6055b854d3386429f7cdc22f892f17eefe5e1ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit vulnerabilities or lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/7qk3b7kvlmgs01n4pipu6jvgdk/91999622552.pdf In PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094b31c2e5db---44504090837.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a28d333b27e---pobufebugot.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/8b2531d12720a3743bcf09732486ab46/57624885386.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/bokupitejojajurifenug.pdfIn PDF document text
    • http://boldogelet.hu/media/54181936403.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/c3gisdju21ovf7ah6pntpe81l8/riwetoweveluvipaxaf.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611620a69fb19---41054485931.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/jusozifomezotoroxokakijo.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210627082034.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/61719052316.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/64049797803.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/89023287165.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210712212455.pdfIn PDF document text
    • http://abwbaltimore.com/uploads/files/78670770378.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb3d40ecba---jitiwurakomiwejufide.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/42586845514.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/tanmcsmn70c58go3urnsd9uhi5/49460633218.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/95039468427.pdfIn PDF document text
    • http://explosivedevices.ru/media/file/96776167700.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/fumakalar.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/34775077158.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=individual+sports+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6B 10852 bytes
SHA-256: d233fee1fb7b786a6415418bccf1a8066465691ef6ebf53a85a6ce2c4f664ae5
font_01_sfnt_off0000e847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE847 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10059 24456 bytes
SHA-256: 4a0d3283e508211f5b5adbecfc00915944f61aea016c634caa83ee232d02f3b9
font_03_sfnt_off00013ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE5 16180 bytes
SHA-256: c0217721a1102ad1f8a8ff5461faadb02f26a3634bfe128d67f68b25b112ee8f
font_04_sfnt_off00015285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15285 1888 bytes
SHA-256: 228445a3744f13af4bf84041e55802a923554d86926eb0745489ea117e4ab105

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