Malicious PDF — malware analysis report

Static analysis result for SHA-256 f71ab5bb9406b0f8…

MALICIOUS

PDF

84.9 KB Created: 2021-09-15 21:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8171e0d661c648c45adbca0efdd5d1b8 SHA-1: 5f5444dde5c1d534444a882c210ba6a95e12cb25 SHA-256: f71ab5bb9406b0f8a9157136685b84056c963ce5e677a40236fd6cf78364657b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution document. It contains numerous links pointing to external websites, some of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the presence of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=world+5+biggest+country PDF link annotation
    • http://webinaris.blog/ckfinder/userfiles/publics/files/dopigurikevef.pdfIn PDF document text
    • http://topstec.com/d/files/pozeratixoruno.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/bosoniluziditilobi.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/vorasono.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/84167840933.pdfIn PDF document text
    • http://lrpharmaceutical.com/upload/files/jomovezubinuwudu.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/soxakiralamaku.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/iigja5sg4p08ujrrj7vvvilq9r/21872782965.pdfIn PDF document text
    • http://roosprommenschenckelfoundation.nl/userfiles/file/vanedejipiwedoju.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/xomakenuluvegu.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/zojafezifapa.pdfIn PDF document text
    • https://cfacgroup.com/uploads/FCK_files/file/pegaxuvasodole.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/161415f8ca4d4c---55535831567.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/52440315587.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/papavozozusak.pdfIn PDF document text
    • http://chokysitohang.com/Uploads/userfiles/files/72178763773.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613a07a509569---tatejoj.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/wotavutefajajegegenulupe.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/sapatuja.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/vukifi.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/14164900304.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/91274969817.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/vakitux.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/xulipadake.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_off0000e6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF3 10864 bytes
SHA-256: 3127d26f7b01fb70d1d1217ad7a1b41191bfb99a7656b5044a0adf3a2d844c6f
font_02_sfnt_off00011806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11806 17844 bytes
SHA-256: 92e346542c32759f11320e0b4ce6a6b8c784b1f8f274048d997de445d3c85fe4

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