Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c29f17ad4619e5…

MALICIOUS

PDF

78.2 KB Created: 2021-08-21 06:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eb976f33cd9ba9b52a7af93d40431552 SHA-1: 9cf7c4fd8064d7c4450e006ed24cbbd159670bfe SHA-256: a7c29f17ad4619e5a66494d1a0466ea18c3e7f3a7fd64bf32924dcef232dd150
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, suggesting it's used for phishing or distributing further malware. The presence of multiple links to compromised WordPress sites and disposable hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/972a020148fade4326afdde0bfc53d99/18201942962.pdf In PDF document text
    • http://dtmaso.com/public_html/Imagens/file/zituwonotazoravuzo.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/75371108501.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/subobepanolowaxudo.pdfIn PDF document text
    • http://nfc.soo.jp/file/kubufidoto.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/getowujoxufifo.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071fc9518eba---79650032685.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/34702780415.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/a5f349f8333aee7b68761f95bc2aed80/84961002720.pdfIn PDF document text
    • http://melabo.com/upload/files/28777097491.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/2707bffd1228eedc5d0ee18e2923ca8c/gazekizumu.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16077c91fe4f46---wovigonifixukoxuzu.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/f2f2a442c7e0a522bd2d4d13de618f3d/wixudigetedalipix.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f727cb549f4---venusuwigalo.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/0d4527e0b681957d92426270bececcbf/12397938980.pdfIn PDF document text
    • https://cape-electronics.com/media/file/difezanalekurepewuzoza.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bizixipox.pdfIn PDF document text
    • http://labsshop.com/d/files/41283689312.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/zomobow.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/suxedo.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/fubefaselomoxuvi.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/vizepakovujug.pdfIn PDF document text
    • https://isleo.com/i_photos/file/1389760984.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/tefixivasekuxopaguxod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ot+genasis+coco+mp3+download+audiomackPDF 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_off0000c91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91D 17668 bytes
SHA-256: 742d86ecf516396b2ff72d29b53b227cb89cffdea05801a445637d419c86b5ea
font_01_sfnt_off0000f696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF696 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 11232 bytes
SHA-256: 2ea682a74dbea1bfbf35eb7f472b235784152ef4847ff0165b1ad99d044af94a

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