Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e004760b07dde5c…

MALICIOUS

PDF

71.7 KB Created: 2021-09-07 22:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d6539e19145a50fa24fa1975ea463059 SHA-1: 8e4dc395bfaf89a2e18b8cbf68df76a5a6240888 SHA-256: 8e004760b07dde5c6baff04ad105dbb3d1fde5037cf16cfb6dd16c7cde8fa2ca
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to various compromised CMS upload directories, suggesting an attempt to distribute malicious content. The presence of external URIs and a high number of PDF links indicates a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://micast.de/wp-content/plugins/super-forms/uploads/php/files/kakqu8oi2f7dnchhqtelo59963/365272110.pdf In PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9f95ac98e2bee8725d31a4b3983fc4b1/fuzizutoxijinuxufonusi.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/gafazopozi.pdfIn PDF document text
    • http://imaginove.eu/data/Files/5264502401.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210807_0e511.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/kotosapepixagelovunareriv.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fea5cca7a---zefefaxete.pdfIn PDF document text
    • https://davaocarrental.com/images/file/dizosinusijepi.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/66b5cc5fceabab4ffd55a432a06e6442/63200344453.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/cdfc71eb030b73d6345c5c1cf131805c/97857473368.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/wifijewefovadinivabewego.pdfIn PDF document text
    • http://fgosvo.ru/files/files/26679858974.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/67482825902.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/kunuzudaxekerakemilavasor.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/lonipera.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610efc3bdc1b5---49368367413.pdfIn PDF document text
    • http://ambulatorioveterinariosantanna.eu/userfiles/files/74410871293.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b56a4cb3c7---puzonejirinobot.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/melidevavofes.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/c64aa6c04e0df9942f25f52e313505c6/genomanodipi.pdfIn PDF document text
    • http://planbmedia.hu/files/38143070345.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/tq6iad7ttetn9qhvu64rhl5irm/rupometolifefujukusisi.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/48218629811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=bangla+pdf+book+download+sitePDF 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_off0000b23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB23B 17676 bytes
SHA-256: 1bc1600a58005200971c0192477cac7a93603872320e22f3750bda40e7376c3a
font_01_sfnt_off0000e05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 10944 bytes
SHA-256: 953b5b61672ed9219e5cf2a47f6fbff4403bcc607cfcd1d772ad2dce2304a7cb

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