Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7c55e6ae8e704c…

MALICIOUS

PDF

90.1 KB Created: 2021-09-03 03:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 81b6070f39f298c95d8c18dd3f45e832 SHA-1: 909b1b0da129750ce1a2a1fd56c0adeddce916ee SHA-256: 5f7c55e6ae8e704c6e77e8154ad035bdaa3d77fc89ec258d8464befdead814d1
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, indicating an attempt to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous unknown URLs, many hosted on disposable domains, further supports a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd222837bd---niwegopivewowemukozikifej.pdf In PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/70465349180.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609263e23443a---31123509629.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/xupul.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/lukisitetipejawu.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/e63e196e314590643d3b1d70cc6dbde0/2631952013.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/7a270b181330ff52032b62f376196d53/zerujetugodosa.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a301784aafb---muliwow.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/79767495709.pdfIn PDF document text
    • http://signauction.net/userfiles/file/nusuw.pdfIn PDF document text
    • https://marbletreasures.com/uploads/image/files/29662352633.pdfIn PDF document text
    • http://sksound.com/userfiles/file/8165808351.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lenabuvuforu.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/iaskqugdoetcc8aphptft1qq77/44423516817.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210808065100.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/zidozugeze.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/85914933388.pdfIn PDF document text
    • https://semut73.com/contents/files/59252978518.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/14266151710.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/vilufabarosexalu.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/76211712044.pdfIn PDF document text
    • http://standrewsparishhighschoolclassof1964.com/clients/70428/File/xetudileze.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c31d2ccdee0---kipovowevatulipivuresos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=note+naming+worksheet+1PDF 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_off0000f5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC0 10716 bytes
SHA-256: b9a19501b52ce32867ead701dca5410e95386c58ae8748e8fadb0be2e7618fcd
font_02_sfnt_off0001264b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264B 19864 bytes
SHA-256: 2ff0ad59167ac95fcd13863ed1440e99eac0fc0b16ff5879bd5a6a37a0aa4f22

Open this report in the interactive analyzer, or submit your own file for analysis.