Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e36060461993664…

MALICIOUS

PDF

86.8 KB Created: 2021-09-06 20:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9627d5489693e54d36d679a81298fabd SHA-1: eefaba78a163e81eb6af565ecbf9dde6f9a6e291 SHA-256: 4e360604619936643bb7827b6113ec8ba96cb039c7f7bbe4700f469eacfeebdc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=convert+pdf+to+word+app+for+android PDF link annotation
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160781510538a8---dofuxelepiwe.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/1e54a1c714f0a4de407ff869df8bb6d7/dibojelivotexed.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160982b98d0f8e---tewadofosokomelafaj.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/mokonirawokewakakob.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/fokekonuparuxu.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/ol6d45j783v7rdrvsh1a936dd7/gafojejijuzamenewewile.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/31616659132.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/6154778062.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/eooqnah7a4h8klf75hlbd3cici/53995679043.pdfIn PDF document text
    • https://lukili.ch/UserFiles/files/77595045448.pdfIn PDF document text
    • http://dgkno.cn/upload/sajewemifuxegupofe.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/79911004742.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/lisosufewu.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/67678747176.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/46980279710.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/fesofazasamile.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160927bb895758---kagusagotudajiki.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1612bac271dbbc---fomofagekojubetir.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/rh1sesjg7rccrdeblf1l92d0dr/lijufizapedixujep.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/kefaf.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image//files/1232573723.pdfIn PDF document text
    • https://apronorte.org.br/ckfinder/userfiles/files/91217687642.pdfIn PDF document text
    • http://birminghamseaholmclass63.com/clients/75362/File/84772738678.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/31897539296.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_off0000f059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF059 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001086b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086B 17392 bytes
SHA-256: 0e4ef8cb6d456e020c991d4a59bb3a33f3d6530f8a1a6afc031f03f6f38807fe
font_02_sfnt_off0001353d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353D 10460 bytes
SHA-256: e267e750f3eb80b55fb5735bbc60f420d6f6ab47d0cbb33b759ddf60e5cd03f8

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