Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04e0d24e03b6405…

MALICIOUS

PDF

79.6 KB Created: 2021-09-18 10:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 152298664ee884e1e6f5b4073e99fd33 SHA-1: fa8d69d8ba298150ff70c13cf02f4fbfdea787de SHA-256: f04e0d24e03b640544ab21a2d1123291ed6ae4a4148701fd1fbda55abff657c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's used for distributing malicious content or phishing. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/9mj79pi5v7dgtll8unnd02d9se/1570754657.pdf In PDF document text
    • http://scandirent-new.ru/uploads/assets/file/fufawimu.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/gebijurupisifotos.pdfIn PDF document text
    • http://exosushi.com/uploads/files/todes.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/68582080972.pdfIn PDF document text
    • http://transgusto.ch/userfiles/file/vodunuxaxirolif.pdfIn PDF document text
    • https://prevodi-plovdiv.com/userfiles/file/66679153020.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/76221204014.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/27611317470.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/wafidotabotegetakesoxonal.pdfIn PDF document text
    • http://rvhifi.cz/files/file/kawugutepupuso.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/xomotimin.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/gunonovowele.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/v4l55fs23af4l309mq0pm6e3c0/gukux.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/91801467007.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/cb8e6615c6b7441ff58b2543977328de/rabuwarosapikivevuz.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/45117592653.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/xamavutemopasifusibul.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/rorowuwusofakenewamisoro.pdfIn PDF document text
    • http://zhymwz.com/upfile/file/26127755837.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/97921679164.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/78556963683.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451a7faf35d---88962101949.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/5744561000.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=different+kinds+of+precipitationPDF 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_off0000d201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD201 10660 bytes
SHA-256: 7262302f0fb2b613af477e64217e2b53a472fe42427ac780835b0cc38e00d96d
font_01_sfnt_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 17812 bytes
SHA-256: 60e48a21e55d05abaf66b617f5680e67cce3d833631b7afd8aaca5e91ae4030f
font_02_sfnt_off000118b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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