Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2fdfc4d19c6543…

MALICIOUS

PDF

93.3 KB Created: 2021-07-19 01:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0b16e7daae4885e125db0f5ae7947520 SHA-1: 7a3f7f8d0bcd9907e76908ed3f8625e425c740bb SHA-256: 7c2fdfc4d19c6543ddac45e6531e24415531dcd0eaac52f20395a5b1b1bfd6eb
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, directing users to numerous URLs hosted on potentially compromised WordPress sites, indicating a phishing or malware distribution attempt. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7216d96a7---zenole.pdf In PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16073bab75e4c5---63472187539.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/15439621714.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/ckb24od4qube2eltu2ruj6dhc0/ginabakafulemo.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/647a990d1ebbc6d11b1e33c6901a4bd3/10402417425.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/93012817532.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/35852998057.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/zexukaditezivexake.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/11205380564.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160980a7f78f85---35449939164.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/setidemuvojozejepelebi.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/fijotidevizupuziputibe.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704d44d5090---39893517570.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/lubifigako.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e992b5232f---revifenibugazutenarolo.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/81488819742.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607040453b50c---89663895940.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/pcn1d9jmptf3lh7fsi7tvdiemv/lajudexutuzi.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/12036975430.pdfIn PDF document text
    • http://apogeeconsultancy.com/upload/files/4797375647.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609df2d863b88---45498002311.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e538a682493---74664585011.pdfIn PDF document text
    • http://ecologie-energie.com/userfiles/file/nunawexajofeg.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/sitena.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/salelezuzuzigipa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+draw+dragon+ball+z+eyesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63E 17272 bytes
SHA-256: be3bdc62f45ed6853bdc4b43c9f6b2f92392189ecd7e41e42ebfa26b5524f414
font_01_sfnt_off00012339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12339 10720 bytes
SHA-256: 4b98ebc6b1cdd51d1bf29ae9f76293508a83256cd22c4589c3f29f7413b7fdbf
font_02_sfnt_off00013bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCD 5144 bytes
SHA-256: 1fb5f1bda74279e534980e970e9d327d5f36d075705ff5114744f2148525fa30
font_03_sfnt_off00014f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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