Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1cd40cd9792ec48…

MALICIOUS

PDF

84.3 KB Created: 2021-09-18 16:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 970196dedcdfcd1efef882e598787980 SHA-1: a0bbf1a93693eb0347a3e5bdb86df91659cfce9e SHA-256: e1cd40cd9792ec4814b51f662d6d03c3ebe3feb9d7961a9c014a163543033d79
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links disguised as a movie download page, which is a common lure for phishing or malware distribution. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The presence of external URIs and compromised CMS upload links further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=harry+potter+and+half+blood+prince+full+movie+online+free PDF link annotation
    • http://bdnchem.com/upload/files/bofabopudegusubega.pdfIn PDF document text
    • https://rintrans.com/files/43840742399.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/gorujifovofil.pdfIn PDF document text
    • http://kd-council.com/upfile/files/morawilakopoxojoxere.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1614068a37a4d0---46523122445.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/14728389229.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/89712649000.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/zazukixixixadig.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///xafifotuzavog.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/bowutupenitodobapominije.pdfIn PDF document text
    • http://chothuexehochiminh.com/userfiles/file/denojuw.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/62464658854.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/levuzotobefajog.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/57888282072.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/68008925873.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/161416e0953f3a---95543803004.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161454c50ee2e1---nemivide.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/68630668161.pdfIn PDF document text
    • http://ukrkarta.ua/fckeditor/userfiles/file/73059591735.pdfIn PDF document text
    • http://foxadv.net/file/175904415.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/falejegorurobajoxaxef.pdfIn PDF document text
    • https://telenovella-bg.com/files/59917687596.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/kitogexomuravepulawof.pdfIn PDF document text
    • https://sanmuabandoanhnghiep.org/images/content/files/domekokamavekakutetujo.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/62584266663.pdfIn PDF document text
    • http://hibertek.com/image/files/20210915_130557.pdfIn PDF document text
    • https://karapinler.com/calisma2/files/uploads/laxabafutafogigesumotulez.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/2887345219.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_off0000de86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE86 19236 bytes
SHA-256: 421312763f731356f94ad032544d1c50780564aaf2e6de885640d7ab79084795
font_01_sfnt_off00011193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11193 11128 bytes
SHA-256: b6830eb07cef96bba4d138f2c977b20efddafc5caf46902d027d60b3b1e756f4
font_02_sfnt_off00012b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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