Malicious PDF — malware analysis report

Static analysis result for SHA-256 107d02775e5b1076…

MALICIOUS

PDF

83.7 KB Created: 2021-09-16 15:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bec38a3814002492f18e5ade70d21d2d SHA-1: 21d8f3e332a2e2484024223eb8c744b85f8ea106 SHA-256: 107d02775e5b1076614b546fbb97acd30550f9da79f6161b9e77a02dfd2e3a0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress uploads and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URIs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://smidgel.ru/uplcv?utm_term=john+smith+doctor+who PDF link annotation
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16141850dcfdde---12016880000.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce2724efcd---64679784767.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109100222239046.pdfIn PDF document text
    • http://hongdacable.com/d/files/54260497417.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/e459b131cda2a0bc888a59b4a24d43ba/42384652788.pdfIn PDF document text
    • https://livbiopharma.com/userfiles/file/sunejepajedixakafuwebudaz.pdfIn PDF document text
    • http://thevale.us/userimages/18885344566.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/jarefilolerat.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/26778318862.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/sadelewabupopumusitudawar.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa1a5415fd---gokaxowu.pdfIn PDF document text
    • http://mmsmarin.com/imgimage/file/84563360322.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/94178430125.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/99175590483.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/161362eb7e3506---12463534135.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/50053659448.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/89094329627.pdfIn PDF document text
    • https://fancybox.pamlskovnik.cz/ckfinder/userfiles/files/48544176124.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/23854500993.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/pevijozelife.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/junulizewefonurazip.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/203e690b3ebe0ace72cadaa8ce9f79e2/bobunapivovedafasutoto.pdfIn PDF document text
    • 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_off0000e506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 17464 bytes
SHA-256: 6f89b09a967ffcc26b3548d6e7a02d1dcd49ad9b7688f898aa7aa7dcd04421af
font_02_sfnt_off00012a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A43 10372 bytes
SHA-256: 2ad3334539b739e1fb107c587b99a5aa4aa932f191b0bac31f5de35bcddc387b

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