Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d40f2e16a968010…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 00:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6f95ba15804ec64406a96e98195436c3 SHA-1: 030accaa4c6d6dc7e98dd5ccd8c2e53d4cca3536 SHA-256: 4d40f2e16a96801063924422abe1d01f1ade1373e5fd666c891cb5c3410e68d7
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The document body is heavily obfuscated and does not provide clear instructions, but the presence of numerous external URIs and the overall heuristic profile point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://emeat.ru/var/files/1340773866.pdf In PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/pujixevobekujesila.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f237d9cdfc8---jonetop.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/zuxerezomu.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/85435045353.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/56feba5ff02e84bd0fdd6d40298135c0/mitukisilefubetusane.pdfIn PDF document text
    • http://minhanh.com/files/74599403711.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/kirusewopaberuvafemabu.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///gagokifuxuzanotezetusejob.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/klo7hmj1mrvk0un3rmqrlh0c22/4895626095.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/zipiwabaf.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b840be6e7f---bisivodunaroxibewajud.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/marutelokisakezezofiti.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/jakaz.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/40223149342.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a216f4adf2d---19936592240.pdfIn PDF document text
    • https://diphong.com/uploads/16474039619.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/1f33dd2c72ff7e3221a0d9fb5b3c2ea1/xamirifom.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/3creg2ufvuemqld347spdh8896/22265471373.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/465b903044a044c43cbdbf094892b08d/wolotusag.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-8-10/20210810083323812874.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/937c7dfebf5391367041ba220dce7b6c/45841541886.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/37684602227.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/wudetilet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=thomas%27+calculus+12th+edition+solutions+manual+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

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_off0000dcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEE 11052 bytes
SHA-256: 19849a3e1889a8a3ee202a1ec43f968c40a4aa517a1a5d1b715bb17e322dbe40
font_01_sfnt_off0000f69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 17088 bytes
SHA-256: b8b0078bad3ba9b62c0889d1c149bd8da50c3867e9f1b13d6c59c0f07750a239
font_02_sfnt_off000122a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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