Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c0e3a3f9e901d1…

MALICIOUS

PDF

81.7 KB Created: 2021-09-13 03:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4eae7cf12d27cb8bb01907e5ffaf2948 SHA-1: 7f8bd38f7afcdb29738c0a1d81345f8b1c67c98b SHA-256: 97c0e3a3f9e901d14a6fc1d64ca896dc67c476964580ad5ba1552183bd40180a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are used in a link farm pattern, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity, likely spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://chcial.ru/uplcv?utm_term=apk+insta+saver PDF link annotation
    • http://vlajkylevne.cz/UserFiles/File/xilisixijavis.pdfIn PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/fabaraw.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/lesazinigiterenagat.pdfIn PDF document text
    • http://xenangheli.vn/public/files/vewanifi.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/41505677869.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/11/file/xizadekogugopazazu.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/e05ec321a15586d65df32b95461422e7/lijotejugemi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c242de3ab2---34607392891.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/15565718380.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/rodeworevofetafidete.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/koratakapojuguvej.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/40619970123.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/93963267577.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/85799136250.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/81425061516.pdfIn PDF document text
    • http://centrons.com/uploaded/file/1384455047613a6053370a9.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/jitatesisunirepawudunufel.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/97862562230.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/45062571481.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210904042219.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202109020635312785.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/61569779668.pdfIn PDF document text
    • https://digireg.org/upload/komexefudejifo.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/lewabixotalivenof.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_off0000d6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 19816 bytes
SHA-256: 09585bdca6deb5046bbb5dd32e0bc27e883df934980ba8ed454b02a168dda586
font_02_sfnt_off00012275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12275 10216 bytes
SHA-256: 154abed99effb5760a1491ab3bf0eb7eb032c8f656a4e86ff0761d6122c486d0

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