Malicious PDF — malware analysis report

Static analysis result for SHA-256 c180057fba4e9e0a…

MALICIOUS

PDF

76.2 KB Created: 2021-09-06 10:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 651a0ccd95585405292cbac7c95029d1 SHA-1: c845dc3c409762c8f90f1f388733de442c2327d3 SHA-256: c180057fba4e9e0a049c0a9cb58baf180717504978431be6583ecec71812ee17
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous external URIs that point to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://wastran.ru/uplcv?utm_term=any+pdf+to+dwg+converter+crack+file PDF link annotation
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/409530efbe4a200c0c6c7fe07963d7d5/dizeguboduven.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890175ea8d9---26235863110.pdfIn PDF document text
    • http://nature-revive.org/files/file/zovewizusirakeririgoni.pdfIn PDF document text
    • http://candientushinko.com/images/file/54813620854.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075c91805691---gikofosagurubarizavufi.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/sujitirejikivami.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19854226881.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/32238819876.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/5259184551.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/80111613889.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/zitagemibakafeno.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/v10pfkgbhigtef6rojb0nv800s/nenuwixilanur.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/6f4bed915d80d186e3522def6746b330/paxagazijoguzixironumi.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/67532463980.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/fhtvaaac19ah2id6ng20lq343u/82459326087.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba061daba0c---25516642559.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b403a5a2ea9---geviwufigikonojofad.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbf741bb55---95336863971.pdfIn PDF document text
    • http://espressobuilders.com/app/webroot/files/userfiles/files/9032875673.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e16eb6389---44112494132.pdfIn PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/bozixedunedapubap.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/mch4uni8ctfi6iqg386a3i0eaa/mulafuvipagejanigifugum.pdfIn PDF document text
    • http://masseydogs.com/clients/f/fc/fc2e217ffa4851e49ca3cd921a15cf41/File/vogudeka.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/basaje.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607023face1f7---woxolunibivazujobixari.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/64738039328.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_off0000c582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC582 17016 bytes
SHA-256: 97dfb8d94c4f8c53eb36f03131552c321a71d1862fc1ab21f696cc6e483d7f83
font_01_sfnt_off0000f172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 10968 bytes
SHA-256: 3ac45f1e3376d9ca3cfd9379ee40aa77a10652e8c1a1b25fa6ca23bd8d445c44
font_02_sfnt_off00010ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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