Malicious PDF — malware analysis report

Static analysis result for SHA-256 047f4a9cad47ecf6…

MALICIOUS

PDF

98.6 KB Created: 2021-06-30 06:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f86fbd17b8b90bfdbb53ae1c7447807e SHA-1: 2a80f133d05453eca85e9b07186dae166f75037c SHA-256: 047f4a9cad47ecf6254b75dba8ba3ac73afb06251f966ec7061146cc49cc0c5c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and does not provide direct textual clues, but the presence of a link farm and the nature of the URLs are indicative of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abafa5b0ae5---2235245466.pdf In PDF document text
    • http://fygl.net/uploads/file/27174352349.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/94199508562.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607035914e79f---votikaxej.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/mazotuveniwekad.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/74643098854.pdfIn PDF document text
    • https://spacio.hk/attachment/file/33743080763.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/30a9856a0949ec4740ce8e3a732e0004/rutopidasuzojokimapu.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/timotulixikubapiter.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608607b3734f5---71516162104.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/vpgk96n4hihupq7mdnp2ualgju/jejazuxuligogexewikamo.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/861fb77757150dec8de42d05471d1860/xijuwaxojoxejetimoz.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/qu75fh86tt874nouh6dvvejboo/luwawatotepog.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad888e4d20c---35080318224.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080df5a2f1d0---89366562908.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/0ded84cb160f189cd909aa83aa73ecdf/32803073330.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/15pjncn5q39lr2p45i5744i860/67140520070.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16091c7d368c83---vazugif.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b29bcb554b1---bitubedugiduj.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aef45b9c7---lenoleweterisosanuw.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/241054044573.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160847f37989da---45361620244.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/449d36d6374f0dd6f49a0f61e7bf0810/21207251432.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/9cd39bc7307c09229f544f87e1e2fe53/47465882419.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/fupufea0n4ng1i6fbd2po27vpc/18468845386.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=cracking+the+case+interview+pdfPDF link annotation
    • 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_off00011cd6.bin
e5680a415ce185835d92b9f6199547b7991e5d24c360420e42acc8d641ce2c1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD6 11008 bytes
font_01_sfnt_off00013647.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13647 16792 bytes
font_02_sfnt_off00014e59.bin
5eaedbdfed012a080f08f98292725e91d8c3a6fe5f7bbf5669b88868a9e44657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E59 17460 bytes

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