Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd7bac2fda86703…

MALICIOUS

PDF

98.6 KB Created: 2021-08-02 04:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fec0e3c64b06cf731012af9d94989be1 SHA-1: c2bb4228cb3c08cd33b11b12b002ce62db4d0e0d SHA-256: 5fd7bac2fda86703683f663e385bfb24f4b5576a99454ef62987450152deb2f7
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised CMS upload locations. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it is designed to lure users into clicking links that likely lead to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/7e05f5a388d8c3bcc49348f1f9ff046f/tirofigo.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/1ebfb2954dea6a0e0b0493dc8d37708f/53828071401.pdf
    • http://nousgarage.com/userfiles/file/95825829462.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160adebd6a3f56---duzexanudadux.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/3b677f342caaefd04dff364d5f22c14a/nunuzarutuzo.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/3a404c1ab63fe6817f320337a48b527d/2598899028.pdf
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/96037062841.pdf
    • https://bywuf.org/upload/editor/files/73893846813.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16073f899246d1---mozonisuzabokugevasu.pdf
    • http://rheinmotel.com/userfiles/file/73444318586.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/afa76a8fe391770b55ffc64e8bb9423d/pitesimekubevokunotibufi.pdf
    • http://szintai.hu/ckfinder/userfiles/files/59118819324.pdf
    • http://amoy-art.com/Upload/file/bawafelevekoli.pdf
    • https://299-45.com/CKEdit/upload/files/23332716571.pdf
    • https://tarzminder.com/resimler/files/xixinusuvavix.pdf
    • https://aplusadvance.com/naver_editor/data/file/57138822948.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610336d32ce23---wajogaraz.pdf
    • https://oddluzanie.net/userfiles/file/fofexazen.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/69157d142a3a34ceb8cea4714cb7e178/gewebevade.pdf
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/53500395957.pdf
    • http://bsa-billiard.by/images_from_html_editor/file/95412570913.pdf
    • http://www.blueoak.fr/image/file/97756710813.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/9bc7fthg8r8gqcee0rmthk33d7/41987599459.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/8a4940d159d03371bb550dbf7a67c037/nananuwekaj.pdf
    • https://valenciamaids.com/userfiles/files/xipopadititagononiwijar.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a71d870e65---jazevumikeligakulariruj.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb4d8891d3---8209122952.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=dyson+dc25+animal+ball+troubleshooting
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011689.bin
4f65472d071816f270d4434068e3aa1c02f4ac5b02de0c521ac657b092787431
pdf-font-stream PDF embedded font (sfnt) at offset 0x11689 19072 bytes
font_01_sfnt_off00014877.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14877 16792 bytes
font_02_sfnt_off0001608e.bin
0615a0a27bc48bfee057c9df39bb6f5f2ebbb8dd29d0c5ca51e7bc6578def097
pdf-font-stream PDF embedded font (sfnt) at offset 0x1608E 11428 bytes