Malicious PDF — malware analysis report

Static analysis result for SHA-256 7306faa02bdd8156…

MALICIOUS

PDF

88.6 KB Created: 2021-07-22 22:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9830da7f5cfe395740c3fbef56558292 SHA-1: 890c8bd53e5f2b8667b0048f4d97ba10b4208ced SHA-256: 7306faa02bdd815676fd4eae02ab7e3633abeb37197e1e6cbff2df376ef837ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to potentially compromised websites, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b550d07a9---wenirasidavuvop.pdf In PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086386ab6922---nixale.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16083ddbe91b10---wovotovazajutabovabuzo.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/38783337664.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/20680e6c3a90a95b315ca1ef7f9755a1/53238169741.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/niromuxaxugijigobegu.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/wufobomut.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/10375923352.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/2087707740.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/13283563605.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/tusatef.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/wamibinesaw.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/454600c641e90e994b6f69793787bb73/91998814501.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/bd2c1dc8c0c164d688619f5bceaa2008/dadekaxuxogijuxizorekiti.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/69607638239.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/lorotoxolalamojurexijo.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/40446871654.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/1ch8ogsdgid72691ujsode22b7/zuxuronotozomenepe.pdfIn PDF document text
    • https://tepihtrava.rs//files/luribiduvaderuv.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cb53c134850---xikirariwe.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/t9maqdv7n26keej2c2b2lcrjmk/mutuziratunitojasozawave.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8aa507df1---48831324640.pdfIn PDF document text
    • https://grandegroup.net/files/93790887937.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/guwamumonufewugedudu.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/tmnn6avm3jvvc35queb1404pi7/85858910181.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4f432ed1f---senabipigofunosebonul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+many+ribs+does+a+human+havePDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/10242443056.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_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF4 10868 bytes
SHA-256: 23222f7ff6e244f6dd243429b67dc0e3edcf7bced79780d8b0d0f2c1d6e83d1a
font_02_sfnt_off000127da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DA 16584 bytes
SHA-256: 3db95bf809c4a75f0b9ab42885de32630dde3f2a7c7c833805dc82b4cecb5ee7