Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a5edd38f14d6be…

MALICIOUS

PDF

75.5 KB Created: 2021-08-25 12:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7aabce8a23e646c19dc2ab31502f0741 SHA-1: a27a38c04754a07b060261437655d0eb39591d3f SHA-256: f2a5edd38f14d6be0b909bfb8ce9c1b1eecf69eafe9b5567581bd02f6f4f5085
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF that contains a link farm pointing to various domains, some of which are identified as compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://w-f-l.de/user_img/file/gotik.pdf In PDF document text
    • https://mimpidia.com/contents/files/rivoxunuxiluvoz.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/28588948814.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/xodebetipiba.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/4202317296.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/6e918b60745c7dc64489a369b7d94830/xinuxinibaf.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/b307bad30d07c7d153f8c6a5279ee7a4/29486275670.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/tufupepelejigofizosotelor.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/dufofuka.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/13426942341.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ccedkb88u6qt7vufovq4rpflf3/68472259156.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/72490125010.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/93561469789.pdfIn PDF document text
    • http://giteduguedesboires.com/userfiles/file/xomixopov.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b7dc30565---gibapaligaliragi.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0748eb4ab80e0ec3e1fb27667ea22ec0/ridibanuriradujobojar.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/ralitodezuw.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0ec8a01cc---zafajikijunoker.pdfIn PDF document text
    • https://fanaf.org/article_ressources/file/56646068205.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f251f7426cf---81802833055.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/fuzanesakejivujazifekew.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/tuxiligalita.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/68687742590.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608567202c380---69448862213.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=as+is+vehicle+bill+of+salePDF 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_off0000c81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81F 15892 bytes
SHA-256: 35a010a9791ff25aeef9b9fc5ce48e337d7574e3f9d8ed055e3080d29947b026
font_01_sfnt_off0000f0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001090d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090D 10320 bytes
SHA-256: 4065ba55eaa9820f7f9f139769d62b76cb69ae513037e430c8ed27eae96b7329

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