Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e0101987f5c41b…

MALICIOUS

PDF

105.3 KB Created: 2021-07-15 16:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ac251385f9cada7c60a84d08d9baaf3 SHA-1: 2c52abc72c79fc019790e1fd41bebd8b823942d8 SHA-256: 46e0101987f5c41b525d14f64b7c7b282a7132d55662896d3e86b704e9779568
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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://burgaseguros.com/userfiles/file/lenozuxijavoto.pdf
    • http://superpart.com/files/625904212.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f2b18f089---jekanexima.pdf
    • http://deurenhanger.nl/userfiles/file/14437875509.pdf
    • https://travelsafeway.com/userfiles/file/karodinifir.pdf
    • https://catequesisnavarra.org/guiarte_userfiles/files/viwibugubila.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160752a7c3843d---dudedimojivozufiteg.pdf
    • http://aep-tc.com/cache/fck_files/file/lorekogigakunib.pdf
    • http://vantaibactrungnam.vn/upload/files/ralirororuliviw.pdf
    • http://kientrucsangtrong.com/plus/files/mipexofowavebumefidize.pdf
    • https://soechi.net/userfiles/file/37953980341.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e276a6d18eb---dugagevasikiv.pdf
    • https://jahanchart.ir/data/files/file/26182115168.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/5b01b1f0b0f97d7778d744bb4c34497a/75827379468.pdf
    • http://diclenakliyat.com/userfiles/file/41898982759.pdf
    • https://fullhousetourism.com/UploadFiles/file/20210701182439143.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/ba3d76b70226c7437c60c06c9cfd9d41/6424169600.pdf
    • http://dgjst.com/upfile/file/61208823123.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d176bdaa75---16445231106.pdf
    • http://www.niziointerior.pl/upload/file/33976686205.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/3cc52dad7c47c166db8b7654b8c43d00/mixigasisobojatidomin.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92cade1dbc---setegogefixad.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/750d27ea2e30e173e337090dae33e956/diluxedasome.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+catalyst+used+in+the+manufacture+of+sulphuric+acid+by+contact+process+is
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c6.bin
c378a8f879fe899b93c688bf6715abf3013879faba0b4a1b56a31a2a15503f87
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C6 27400 bytes
font_01_sfnt_off000127d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x127D3 16792 bytes
font_02_sfnt_off00013fe4.bin
5dd21090660362bafc860e7951261efc9508f81e16d7b249974ae9d4e8517b42
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE4 23580 bytes
font_03_sfnt_off00016bdf.bin
34a7920d97547cffe8734f511dfefc004d24b510b49b968d63688d0ed42b162a
pdf-font-stream PDF embedded font (sfnt) at offset 0x16BDF 11200 bytes
font_04_sfnt_off000185a5.bin
62e530b4f9ff7ab9aa65c6a5dae122722034181cc49f2c17b94686968ec6c1e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x185A5 4696 bytes