Malicious PDF — malware analysis report

Static analysis result for SHA-256 4868d733abba1f52…

MALICIOUS

PDF

78.6 KB Created: 2021-09-13 13:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 759a884dd85e788421a25021275f3461 SHA-1: d7c0841d25efa206cea1390a8d13b87e3dc95794 SHA-256: 4868d733abba1f529e9df4f96564ed28829ebead8137c61bfe658d8fb034ece5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating an attempt to execute malicious code. It also features numerous external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://alrashed-alsaleh.com/userfiles/files/jafozonepozepeguguduf.pdf In PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/53671734454.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/1311629984.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/64317706723.pdfIn PDF document text
    • https://sthouseluxury.com/upload/files/49903781638.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/36341913389.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/dukefadigizutuxuz.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/60606994246.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebeb6cde53---moduka.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/57750268423.pdfIn PDF document text
    • https://komunalno.vrgorac.hr/files/15521311992.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/90980908480.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/sabotemad.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210903103644_1012466355.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0981a1a09---segexinu.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/tilixomasafelitobe.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/48084795889.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/wefobazi.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/fexakimodolodit.pdfIn PDF document text
    • http://metapolar.hu/tmp/33664035662.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/88688178335.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/fevevigejowulasan.pdfIn PDF document text
    • http://alltechsro.cz/files/zebewaloveduko.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/56146900019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=update+miui+12+redmi+note+8+globalPDF 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_off0000c6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000debd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBD 19688 bytes
SHA-256: e87f31765f1438a2f0336dd2ce87a6438eba8f77b8ef5c07b2d21f1ec910dd93
font_02_sfnt_off0001131c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131C 11196 bytes
SHA-256: c35bdfa9d62afead3a2260a6b14804364d81379d1f3d05f4a59e87093a95640e

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