Malicious PDF — malware analysis report

Static analysis result for SHA-256 241e49742950a6b9…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 00:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 27dd0486d994c9f49751d6cae34c9b0c SHA-1: 8eb0b267edb508b6a8ed1ea2968cf9c9d3225dd9 SHA-256: 241e49742950a6b9c14e7299c34d2a00030e47bbba45a174e3a4ffaedbac1eb5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, suggests a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://philabc.ru/uplcv?utm_term=thor+ragnarok+telugu+movie PDF link annotation
    • http://uptindia.com/newsimages/file///wudemokeribopofigo.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/wilarulimesixowoz.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/34057112474.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/rarerudexoroke.pdfIn PDF document text
    • https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/98253892431.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/varoxatizavavuxu.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/bepegapasiserezavorewebof.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/dijomipiludawubu.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/77240005030.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/72314814301.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/24259100042.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/27875107485.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/wotipivavipu.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/64201017553.pdfIn PDF document text
    • https://lapakunited.com/contents/files/96164322672.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/witirizuloviladex.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/ninebilevofubupib.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/pasevugurikubobili.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/78249562556.pdfIn PDF document text
    • https://nenmongdangquang.com/upload/files/pobosakazimutuz.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/resowalewulegoxofagasujox.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/jubolubesamozefo.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_off0000d7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E3 10608 bytes
SHA-256: 0a5ebb82670a886b5f1852be9ed0a1cff6670ff20312d5ec66223f7d7d80637b
font_01_sfnt_off0000eff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF1 17964 bytes
SHA-256: af59837e000d3d3579ba40433dc6358d878a2ad37b3e78aa39a82d0fd4e7d252
font_02_sfnt_off00011ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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