Malicious PDF — malware analysis report

Static analysis result for SHA-256 987abce3f7675266…

MALICIOUS

PDF

81.0 KB Created: 2021-09-05 11:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a22f0520abdf5f00562cc94117b89178 SHA-1: d6887c4ade75dc075f5fa5e8a82300cae66d615b SHA-256: 987abce3f7675266abccaa94b6bc278c6cc3240e89d7d553c43c1d67bc75e88f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of a link farm and the nature of the URLs are indicative of an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://administratieindex.nl/images/uploads/lelaluwiwu.pdf In PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4b99ba076---65752546287.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/4634c9128b0d8b9b8ebcb66557fb1dbf/vatinizubomowaborijolum.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/bitavizojunubet.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/vuxobir.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/75348669909.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2e1f53b98---sovesogukagebijidon.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/ribejupekewed.pdfIn PDF document text
    • http://builderall.info/userfiles/file/soliburedagovoj.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/49700197664.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/45217644070.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/e17fr00pa80m34njroticq8eu5/98554230494.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/fakojik.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1611fcb9b5a712---73102018292.pdfIn PDF document text
    • http://elitvorota.ru/f/file/59145756554.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/ridisalibabigoxe.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/c820423ab3750973da38a6096f17f9b3/donuridufajiba.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/59543941272.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/59368604297.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608386c362720---21503354662.pdfIn PDF document text
    • http://abpaluso.com/upload/file/61591422718.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/rapowik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=5th+grade+math+fun+worksheets+freePDF 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_off0000d966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD966 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17D 10980 bytes
SHA-256: 5a0cfc4fd42cdddd09808302461a58a6af048e12c34070d23b9a0703044019eb
font_02_sfnt_off00010ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB7 17220 bytes
SHA-256: 14b36bb81efcea393e1623a39a362d14243513c11d553eb38adfebb0d7053833

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