Malicious PDF — malware analysis report

Static analysis result for SHA-256 33fb27e9f08f17e1…

MALICIOUS

PDF

92.5 KB Created: 2021-09-06 17:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: efdb0bd8b83bf641e956407fe884a468 SHA-1: 3070d67a0c036cbac5a4987b0283ee5b54a1aba1 SHA-256: 33fb27e9f08f17e18f4637d74b44695d2578e6d876068239c8c6715c3b0049a8
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 phishing or malicious content distribution intent. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to lure users to potentially malicious sites for further exploitation or information harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://belloverde.net/emailer/file/pavotoxufebuxunazodixu.pdf In PDF document text
    • https://hirurgija.me//files/33638837221.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210831142824.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/wudazimivorizavozuxu.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160edec82b32d9---87941690422.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/30818939510.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69323109327.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609156ea9f026---99086011088.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/963d40968281d421b9836e2ff283907c/41130983296.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/79061396328.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/877ec6b558e9203541c35d368d7f602b/39794621236.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/85431011033.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/selemobit.pdfIn PDF document text
    • https://scapetime.net/images/website/user/files/69500303665.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/32240163698.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6d9449104---85158565754.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607286fa0fd78---busevojeriluposu.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/tugifawimelupasaxeribix.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/b1bd992ceed680ebf7525c05b5aaca68/4316258259.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/29190942508.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/665917f0a7b92e72c6c40128a281c52d/20653298290.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021728651291503.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5ba4012fa---borufulanufosalute.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d6408492a1---wakanoranaremosi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=electricity+and+magnetism+purcell+solutions+manualPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/56adf186a1dcdaa327c5239dd7ee0190/93741107795.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_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 18508 bytes
SHA-256: 2207bb660dc2e87955c60b5f6d2388c2c6d8e0229f7f068c07255b7f5ff18f91
font_01_sfnt_off00013298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13298 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AAF 11052 bytes
SHA-256: cb1787286952659e2ece5e6b0eb02ccd458d75a99bf7cd13c47f3bd888f0d4d3

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