Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59c0e6c1dfba67b…

MALICIOUS

PDF

87.1 KB Created: 2021-08-14 22:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2e1a7eaf7426dc0ff6d74742d64c82be SHA-1: b7ac7beb1aea7adccb42ee440cd5b10702c9cb64 SHA-256: e59c0e6c1dfba67b1ab4dff7ece9ebeded0ddb1459216cb2ed81866ebc181392
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs are the primary indicators of compromise, suggesting a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/e7e9db5d4c8d1a94990934fe04c0e294/28179073786.pdf In PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/afgine8k37idu4dg1djg9coutf/nemit.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f946174bf---juganigerov.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/vopomutoniragerijone.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/om0njh4tossferh9runp6aaqfr/dujabasexinutowilefinolo.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/25226512839.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b0645b46c72---dimefovaxus.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607101099e758---balatodonefub.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/zobamoku.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0b1d3d6ad---buvawomopalanenukax.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/gadote.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/1b128825ca09f48d5b85eb2ba88f0f2c/wasumiw.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/t5bdb7s7d92p0mbc14pdf28kk5/nobunaxize.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b892a403b78---pogelogutazomifavulidid.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083659d668a1---ramojusukele.pdfIn PDF document text
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/tifowowodojaf.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/q7tntojfqm7qub8milucpoq3d6/lirapajizuw.pdfIn PDF document text
    • https://avela.md/userfiles/file/3671265512.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/80175770466.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd250b4aeb---fefazutoxobax.pdfIn PDF document text
    • http://akademibt.com/resimler/files/24246888030.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/c6307da24f81e8a9662d840502eee262/87488246598.pdfIn PDF document text
    • https://moolans.com/uploads/files/55962905807.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4943565903---8562702683.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/ruzirozibi.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/zosodota.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=exercises+for+cervical+disc+bulgePDF 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_off0000f183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF183 17536 bytes
SHA-256: fd62dad8deed999ce4c18e543c81c5a40f6119a060df577e3b2c2df7bde7b03a
font_01_sfnt_off00011d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D82 10840 bytes
SHA-256: 99dbf1360ffe4c8206c2d2241f84ce13633d1b01429aa876633d8782487787b4
font_02_sfnt_off00013676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13676 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1