Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e088bc3d12352c…

MALICIOUS

PDF

80.8 KB Created: 2021-09-20 14:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0fb6468fc174dc26234b0c7cae397fa5 SHA-1: 21a228b4be5c0eaea7b89211f112408dbfad7b9e SHA-256: 32e088bc3d12352c18375a79b4148b1b5c5f125c7981ff3de1c330b5c58b7fa6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The document contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded links and the detection as a trojan indicate a high likelihood of malicious intent, possibly involving the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://krisoc.ru/uplcv?utm_term=stream+tv+apk+download PDF link annotation
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613335e6c4512---58883703339.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/retobijobetogoz.pdfIn PDF document text
    • https://officialbacknumber.com/editor_up/53867271925.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/86053389402.pdfIn PDF document text
    • https://curvy.tw/upload/files/24557141766.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/7f89279a713b3a070eb9a90e40342208/kilutigixi.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/67082950186.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecd0e73bb0---xolivadumimo.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/98968839741.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f6631bc10---susezobudobatezej.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/2d2b31fb8ca8af4bdef4af767f4eb38a/todanageritawejof.pdfIn PDF document text
    • https://kalendarz.probik.pl/fckeditor/userfiles/file/guwewiromebewijefavade.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/93135259858.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/rexadawoseru.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/lixofim.pdfIn PDF document text
    • http://gzsjlt.cn/userfiles/file/10803227110.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/jofumosunepafa.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25040037456.pdfIn PDF document text
    • https://gianlucabruno.it/dati/upload/file/97714075435.pdfIn PDF document text
    • https://orrizon.ru/images/file/tolodaxufasu.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/vebiferitelororuzosote.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/73415527604.pdfIn PDF document text
    • https://shivajigrihnirman.com/singhania/downloads/file/88572983885.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/99469739456.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/tozivegix.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_off0000d487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD487 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9E 10612 bytes
SHA-256: 4ab7d8a5dde8a49034a5d0e352ee91d684aabf316449a34ce4aa7ca3024d931b
font_02_sfnt_off000104ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104ED 19036 bytes
SHA-256: e756fb279029c10df6b92f73f5992434087abb1fafa87474bbecc1b488a4eb57

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