Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bb4a1d35f1d0c9…

MALICIOUS

PDF

77.2 KB Created: 2021-09-17 20:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2b0557c936abd3074a437f5058790afa SHA-1: c49690644f38f527ad7022343f7dd03f88b9c863 SHA-256: 67bb4a1d35f1d0c9a0ed58eb65129c3746ecc99e887910190cbad1264af1742f
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to external sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://myparrotfood.com/user_files/files/8441425384.pdf In PDF document text
    • https://igraonica.me/userfiles/file/46779574230.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/92756825958.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/wikukesinekunenupuzuxo.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/8dce1dc99006a262bcb58ca0e5ce2ae9/xaxozonebaxakiwi.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/7381728510.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/78770507328.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/71570631413.pdfIn PDF document text
    • http://mutitar.com/user_img/files/18890779617.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/02/dadexokelijesoluluxo.pdfIn PDF document text
    • http://tomdythai.com/userfiles/files/43548572904.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/nutelewavibepetexa.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/fesebab.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210916091733.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/gupujebemidovakod.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/17363634328.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021090508150680554.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/mosawolusinomesujoz.pdfIn PDF document text
    • http://azinsaghf.com/cache/fck_files/file/podedumatar.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4011d631894ed17e8ee4a56bffa6b712/24971611622.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/vimamitamote.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/60525947808.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/7286997552.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/85748544036.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/42133801518.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0e95f1b12---namofipajagikagojijek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=lego+star+wars+the+yoda+chronicles+apkPDF 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_off0000c286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC286 19996 bytes
SHA-256: a9016dd85afd656220034e814c1a1ff52555081ebd9ab148a50f76d472e0d195
font_01_sfnt_off0000f5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A3 11044 bytes
SHA-256: 037a78354828ebec9ceaf70a3fc087cf152bb1e966ee998eece0d8fc9da0d40d
font_02_sfnt_off00010f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1