Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba7e2ab6d5f698b…

MALICIOUS

PDF

78.8 KB Created: 2021-08-21 02:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ff3a83e03dc35a9bd02621d8f5289a7f SHA-1: 3ca0c090f98590d599558d1d634cc308ae58bf68 SHA-256: 0ba7e2ab6d5f698b96fe46a5a5b959612e2538ce82cd33be3fd5ca19876ea650
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with a malicious link distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/e67240de4e6eaf4efa519b8aaccf0745/divofigevalevawogokatu.pdf In PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/0caa7f106922370ca47057583099d8df/95779429607.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/34864277107.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/budijalarar.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/jebarenuwajazimugavorin.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/wobujigubarewadetidux.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5426c8f34---nakafome.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/76277339079.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/23793281116.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/70888772400.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/82603410819.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/40a320b2113df71a46554453400516d2/70783869974.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/77142057909.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072c4b37d857---fefodepa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094268472e81---fawibenugujofuregerovuw.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c194ada1a40---67003944916.pdfIn PDF document text
    • http://madang.eu/f_pds/fck/file/44767726721.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735c754b704---diredexekavesemup.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbeb1637c8---36820709822.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/saximasu.pdfIn PDF document text
    • http://staropolski.net/Upload/file/4946209667.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/vuzikefigid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=logarithms+practice+problems+and+answers+pdfPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/27336003238.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_off0000cef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF4 16616 bytes
SHA-256: ce87a0663f3ea22b4bcf2accc8cdde3e5620a630845ff4b4951158a85b575b54
font_01_sfnt_off0000fa59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA59 11248 bytes
SHA-256: 4141cf860a326aab6422b70994d36c41ef586cb09d9546076033077628c62ca7
font_02_sfnt_off0001142a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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