Malicious PDF — malware analysis report

Static analysis result for SHA-256 9874c234a6cdd529…

MALICIOUS

PDF

156.1 KB Created: 2021-07-22 09:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 34731cef9ef6130c7e3efb160f5a0c8e SHA-1: 4aecde5329ad40b2ff51975e825c2f78ef340905 SHA-256: 9874c234a6cdd5299d42ff5d402b6c13c5fdca290a10411402fa42e4c2321503
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7342

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

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

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