Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb1ee1e2d9815e9…

MALICIOUS

PDF

84.4 KB Created: 2021-09-02 06:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bed75d1164b596a5cf9564436cf0f83e SHA-1: fa8c5f0d4be1fb7904f3afc71ea14ba8fe709ac7 SHA-256: eeb1ee1e2d9815e94b9c2fb43c4ba40579e40c9a5bffc4967becbef7baaf800f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the nature of the link farm implies an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/613892d07de2d288858884ffba65499e/61802445957.pdf In PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d04a777b03d---vesalo.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/jomujavupegenabatijoxeb.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/161010803485f2---61220659723.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/bhup8ipm7hclcv8docrrta6fs2/jibizosetudokejew.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/6a0dp1urd6vmhedr34h1fr995f/xuranufalufexisugolito.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/bfc4cf52be57f9816cfd7af1cac75f93/70436980883.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///fatoduwad.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/sotuwupewo.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/j4ukhc2c2ovmmkv41svlvu98bd/juxodapulopazadamas.pdfIn PDF document text
    • https://lordoptika.hu/files/files/98583706519.pdfIn PDF document text
    • http://splogservice.ru/content/file/safurinu.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210823_225739_8143.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/76130111837.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/12963324094.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/2205d2390ad52ec9e1a491c3e3efac84/zoratowin.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f7c95c178ce---94363572138.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b102792f107---tilolawiwopurakaxuzana.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/nukoji.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/fikax.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/jujisujomuwetejofikolim.pdfIn PDF document text
    • http://matras-devison.com/upload/file/fizokisigul.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ee937b9c1---49174116470.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/74057614627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=distributive+property+in+whole+numbersPDF 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_off0000e337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE337 10860 bytes
SHA-256: 27f442fcd2393968172715177e722c07cbd4def25b7f4cd6439a986127b6dc25
font_01_sfnt_off0000fbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001140d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140D 17996 bytes
SHA-256: 3a7503c772d8867c6d2e6ffdf370a69c16e5d442dc27950fd29b06bfa49237db

Open this report in the interactive analyzer, or submit your own file for analysis.