Malicious PDF — malware analysis report

Static analysis result for SHA-256 74655e59a25329f1…

MALICIOUS

PDF

77.6 KB Created: 2021-09-16 02:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d8f8e18faaeee64e92e95f1f0e7eb7a SHA-1: a6ef2991f8c96c1037176d1fd398588228e9fd61 SHA-256: 74655e59a25329f18c9e74e9d9df9bd09f8836b5fa7c8658d4545756b7e21d71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://allytemp.ru/uplcv?utm_term=tamilrockers+free+download+tamil+movie PDF link annotation
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/4b0e23a8a012395414be07fb8350b7d8/mapojezusuraw.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/28375452786.pdfIn PDF document text
    • http://imbirimbir.ru/files/zusofepefe.pdfIn PDF document text
    • https://matratva.in/userfiles/file/94898130542.pdfIn PDF document text
    • https://senegal4d.com/contents/files/35309802708.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/32617676354.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/d1bripqi0nfh5sm4dp2jjnkar6/85304232142.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138b32c2d27f---derorigizawaduzinab.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/85281167098.pdfIn PDF document text
    • http://www.puhito.hu/uploads/72008536527.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/98641158705.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/wusiditilujapim.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/bokexefaposukemenuvumokul.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/tadalogeluwano.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/vumanorawejazajalixog.pdfIn PDF document text
    • http://locke-3c.tw/uploads/files/202109151411528255.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/67149454346.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/nidetaxozugaluwax.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/jamofofadirewilipogaka.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/15919828294.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/mitosodogakorogegikanale.pdfIn PDF document text
    • https://maria-galland.ru/files/file/99969385285.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lejapafip.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_off0000cdf5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF5 16792 bytes
font_01_sfnt_off0000e607.bin
b701d488f919a1db624f1a1afa068eef5c4a927c945fdf791e38515bc519c38b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE607 16272 bytes
font_02_sfnt_off00010f5e.bin
b83fd15cabec51d0d45ca72186105ea77a7c94dc1439b95302aaace783c17d09
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5E 10844 bytes