Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb7362bf206d52b…

MALICIOUS

PDF

78.1 KB Created: 2021-06-26 07:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 873578b27759873946c6c09f0650eb5a SHA-1: 0a04bf98c51566aaa66c932b6bcaf4c7a7864ea9 SHA-256: ceb7362bf206d52bc46bc87705d0fccd9468f8c840082efbe2a9475e5fe5f52b
156 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://implantsdentairesdesmoulins.com/upload/editor/file/20237930511.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/c84325355c3facb33ff95e840213b882/banege.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab29468b6c---leseboveluf.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/92tm3m8v9f3iff9d3ql2iobl43/70890545676.pdf
    • http://bannermaul.com/userData/board/file/37988259940.pdf
    • http://chi-kara.net/userfiles/file/kativ.pdf
    • http://staractivecollection.com/resimler/site/files/zawesedejifikegowoko.pdf
    • https://irrisyst.eu/files/file/18079990494.pdf
    • http://akicgiyim.com/userfiles/file/pategomekogaxos.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4396d6dcdd---fewelaropav.pdf
    • https://amatnieks.com/pictures/image/71003540252.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/mqa20icgtgjhhh1br0lc99tsfp/diguk.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9901377a0---zosugaman.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/84c25ed01e3371a0c390ef816d708dfa/18603171968.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f4ebed9ff---12232487577.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/jd4e4rc9rg34mgqva55mrcknj5/gojuvemomutuwidavawebusuf.pdf
    • http://studiogiovannone.com/userfiles/files/ganidogotamunoki.pdf
    • https://iva-vietnam.com/userfiles/file/75426952438.pdf
    • http://timandlor.com/userfiles/file/81449517587.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834753b1415---55476117693.pdf
    • https://mamo-tato.ro/userfiles/file/tedevobonopuduje.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d74c8c5b07---webivigeboribof.pdf
    • http://cepsagibyachtfuels.com/images/photos/17072129645.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=women+and+woman
    • 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_off0000d21b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD21B 16792 bytes
font_01_sfnt_off0000ea2d.bin
ff99527b35c5be152a1fd925c971515d5c4c404a5092e60d4672da895847a3c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2D 16732 bytes
font_02_sfnt_off0001156c.bin
edc4e9ef8150a26135f76aa4b212f833ed526acda98af458b7435af85a1d2c31
pdf-font-stream PDF embedded font (sfnt) at offset 0x1156C 9984 bytes