Malicious PDF — malware analysis report

Static analysis result for SHA-256 989e8a4517ebfb16…

MALICIOUS

PDF

159.3 KB Created: 2021-07-22 09:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 709ddc49ae022925d27fdd7261d9c729 SHA-1: c5f08c5e9050eb174252a21969a8bee16c84051d SHA-256: 989e8a4517ebfb167eb148b08747d2ba2afd498df8c9a10cd4f59cd43e172072
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or SEO manipulation scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://naplesredeals.com/userfiles/files/46403839775.pdf In PDF document text
    • http://kppzp.pl/userfiles/file/rulujobupupafimef.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/469399053bb7c25f87a6df51c0fccd81/48154419725.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/bopojetazevan.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/xazej.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/zulovuzetudurudigitaj.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796cbf7eaba---vikedirimirikapisavofa.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/4sl4r240777hlfptd4ipfgmqgp/30048964190.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/mijovopepegamo.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767db6d0079---zefagupaji.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a06978843f5454b09095cc92d3e51edb/kolazej.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f098555d6---97052812867.pdfIn PDF document text
    • https://makenie.com/upload/files/29827386558.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/4eb7385ba184afa75f6d7250db42ef71/viburenogazujonimujilu.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/43858781207.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/44095c36408fce2fab603509f4d0f9a1/78627603943.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d184b5ef1---gadulenerikasumurikera.pdfIn PDF document text
    • http://flardochform.se/userfiles/file/70638314539.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ac6megbo6pl9vstdlhu22o87tn/julimowokonuveruk.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/14923196315.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/zomulomegenovojobujix.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/zepuxerazixuvijoserepi.pdfIn PDF document text
    • http://lucann.com/Upload/file/89890665121.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b62bf34ac17---bamutajetigajekagibaxa.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/jorumisivafirorak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=ancient+greece+dark+agesPDF 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_off0001fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE62 10452 bytes
SHA-256: 175a8a8217ab09e7a873ea4174a31cd86cef2a7ec375fde7a48fd78392861823
font_01_sfnt_off00021613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21613 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00022e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22E25 26672 bytes
SHA-256: 9f1aee8a9e4fb4db1d6376216acd6d5147253578d4c47d81ddd4f8eaad574255