Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5e3cde1146ec01…

MALICIOUS

PDF

82.6 KB Created: 2021-06-25 14:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a75e9da7f7233c404ca74a7d2b05e0d6 SHA-1: 657ea94aa22afe277daa271f1956933bf8d7177a SHA-256: eb5e3cde1146ec0126eb62d210a4bbbc2409d4c117d9d8b157a97a6664d5cc62
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://beateromer.com/bilder/file/60347821403.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aa88583f5d3c1e665ac33416a1b04843/56600299125.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8938c5030---26996940959.pdf
    • https://alteanetworks.fr/img/file/68079133889.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/5bf423e8e71b4389ab1c25a47fac6e74/17924484695.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc6fabc4aa---bopubitugamigajid.pdf
    • https://xo-sound.ru/userfiles/file/15660335207.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/62df38e57219949a9e4d7621c1cd822d/99015508675.pdf
    • https://palezieux.com/ckfinder/userfiles/files/61547997354.pdf
    • http://penzionklara.cz/userfiles/file/zexelevuroponipoxifimin.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/o099os29d02gfqnl306uvqofdp/vawodebeluneleni.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/suil3caod3roq6q86h2rbcthqs/dusume.pdf
    • http://myblindz.com/fck_user_files/file/52652670804.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=scary+stories+to+tell+in+the+dark+full+movie+123
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df88.bin
869f7be04c83bc9657c9a81b0ef124152ed50c5eaa76651ecb253b0812ef5fd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF88 16464 bytes
font_01_sfnt_off00010a33.bin
1562cac5194f31d7a1a786e49681df47dc881a0a8167c47adce2197e85c8e732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A33 11532 bytes
font_02_sfnt_off00012577.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12577 16792 bytes

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