Malicious PDF — malware analysis report

Static analysis result for SHA-256 affeb27602c627bd…

MALICIOUS

PDF

94.4 KB Created: 2021-06-27 16:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: efa91f74955c8e3149a1c7d1879976d1 SHA-1: a203a5292a93b57162146aef04d6cd93ffd842df SHA-256: affeb27602c627bda9fbeb40fae2b05dfce75f88f3e1d5a277591e9ee8528c2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and link farm characteristics are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097466292e77---goletikuzimidigokomarem.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/4be49d311651223b9c509f19dfca8a03/tutizuwinipinixo.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b52d036a88d---lekenuwazofutugepup.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90eabab52---kanitinixipexubeb.pdf
    • https://baxsporthorses.com/userfiles/file/83114546520.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba535f8d9a4---mawekizerogexofadek.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/fdlnl1npbl5aj15q0mbsgcrdhp/61173721240.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f16e09a7b---18798312869.pdf
    • http://www.medicellbank.com/userfiles/files/powidudipudivugiteladom.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/neq0or9pd2fr137gf4aoanjd41/fafufazog.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4410be201---rulonejosafi.pdf
    • http://southport1969.com/clients/861680/File/kibafun.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160899c62c57a8---74506477562.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/p8k6jjuftj3qk102epeaimh9gg/zuxoxuwifezalomezurejeg.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/u6s5vt2aas0grp5mjb4ipa2926/lozifemetig.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b63be290ca0---rukimoz.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c56b14a73ce---38147135304.pdf
    • http://kasintorn.com/images/upload/files/vesisezapirazofowokujaxu.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/bd50285e5c85138bfd21d4a4b570c995/satomubepaj.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/39f2bb365fca3dfdae38d05988fbc642/sisolifovulemabuku.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/i5511klr0tb6508dar71ch4nb1/tozarotudowezazejul.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/62442290429.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=specialized+sport+bicycle+computer+manual
    • 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_off00010c02.bin
5ee62958f8711ebe5d6a07f4729bc689f4a91cfc075f549ead6212c5c9b44181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C02 11164 bytes
font_01_sfnt_off000125e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125E8 16792 bytes
font_02_sfnt_off00013dfa.bin
c0061a0dc1eb14376ef6749a15739eeaa0b1ce2ee02d9e1795a288ab5e0148bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFA 17588 bytes

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