Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ce2f4edfaf1566…

MALICIOUS

PDF

86.2 KB Created: 2021-09-04 19:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3b8396948c4c1a1b4a6c98b4908318a4 SHA-1: ba0f93d6988d28f3669c21a86be8dac4c3a6372a SHA-256: 32ce2f4edfaf156618251679c628a16fa2f7f656a4e1165da485841ae162fead
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm strategy. The PDF structure and the presence of multiple external links suggest an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://xosobacninh.vn/webroot/img/files/80178235012.pdf In PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160946f8324bf1---vumuw.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/38dc1e4bce9a8acfcf1a5a65dc8a9fa4/57457265871.pdfIn PDF document text
    • http://newtech-utm.pl/userfiles/file/tedusuzomibiwodo.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/gabowoziposagovubek.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed97f6316c---25115156452.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/49097452ccd57b333241730af36172b8/sutinoguxe.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/2eaa6ec5a0fc9fb3802301cb7b0a370a/64288910530.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/xapimujemoperunonozoja.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/p2nm01kl3m19o9o3ph91umu6no/67481845706.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/vepazimururikuzoj.pdfIn PDF document text
    • http://www.moyekolodin.com/files/37908922987.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/tavebaloj.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/fefopamuvozedogazag.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/lojizedovivepumewexo.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/97650283199.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/20994788940.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612e5841e9daf---62879307837.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080497563d35---kezopadobawabinil.pdfIn PDF document text
    • http://beijingbeat.com/contents//files/pifitizo.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/zitazorigapit.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/44043451720.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/porufixixusufokaxuz.pdfIn PDF document text
    • http://stl-hk.net/userfiles/30369554272.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=modul+barisan+dan+deret+pdfPDF 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_off0000ead9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 10724 bytes
SHA-256: 697dcad58fc9276a5e24e8e8428e85c0ee7c40bf425128bb2926e754433fb4b3
font_02_sfnt_off00011b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B77 18380 bytes
SHA-256: c1d073d0426033f338c8a4aa43256fca20ee73a60a0baa618aad643e60fc8dd9

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