Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dcb6a970a79945f…

MALICIOUS

PDF

74.0 KB Created: 2021-09-09 17:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7040410c45223ce3df9b22e2fe22d131 SHA-1: 1d4464500470c29cfcc5ca10842ec4e3c0720443 SHA-256: 3dcb6a970a79945fa554c768eb26dc41764edd336ce092540bccba3037651be0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many hosted on compromised or disposable domains, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, with the embedded JavaScript potentially serving as a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=pokemon+super+mega+emerald+cheats+rare+candy PDF link annotation
    • http://le383.com/uploads/files/buwutanid.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/duwolijulikuzozoma.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/2955ab8a1c69a570835eaace965c7bed/66863431476.pdfIn PDF document text
    • http://tainghe.vn/userfiles/file/xilinudi.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/37753164534.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/fadedofipufopavavo.pdfIn PDF document text
    • http://myepres.com/HotelEstimator/userfiles/file/57279506702.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/65419175618.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c0ca8a406---49159177322.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/70715819962.pdfIn PDF document text
    • http://lexuspolymers.com/assets/ckfinder/userfiles/files/3663660050.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcaa602b0b---73579490956.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/zaketujip.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/matepinetefuwovomebivif.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/21202325775.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/folaxoketefetijuletawipez.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/64379817645.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/3211854281.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/10811207740.pdfIn PDF document text
    • http://holzweiss.at/bekojirunamakawowu.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/70561368784.pdfIn PDF document text
    • http://domplus.su/userfiles/files/53859165516.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/35934462051.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/nowivunafiwesunibopofex.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/1f6ac918060bc71e3ec9a9d5d80de89e.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/161317c66678a2---gubusat.pdfIn PDF document text
    • 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_off0000ba06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21D 11176 bytes
SHA-256: 4fcfc0ad9d37f8790bb27eb7da420407d3b141cf0b2ec0c4e57c4aa98e073bbe
font_02_sfnt_off0000ebf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF1 17484 bytes
SHA-256: 2451b0bb5c44690b9c715b7b7d331f688ef916e0bce91ed2fdd8650c6e9ca36e

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