Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4ee6e7137e6d92…

MALICIOUS

PDF

89.2 KB Created: 2021-07-15 12:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5daea85e6053b83b5cb05afc15b82910 SHA-1: 26b46fcc7938f173da2ec2ffc706d05167f93094 SHA-256: 1d4ee6e7137e6d92fa3460a0b62a74a265f90b356a8c0d00193efecb9c84b4ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://universalestetic.com/userfiles/file/zivuveguve.pdf In PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/57224872392.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/68782070430.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/25228927092.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7e47053593---47374130142.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/89274568333.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/80701220425.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc9b67de09---nujomefiwa.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4b613efcc3---medaxebonorepejevevewifu.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/99580990324.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/juxifitegaxaw.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/likitawubirejelimalejanu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a8ff53d40---83870735810.pdfIn PDF document text
    • http://kalikraft.com/images/file/sonosinowegonam.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1d0a1eb34---11499051635.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/0f66fd3ded7f5f71240b766aafd9c73f/wosefisam.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/posemifigofuxufaminigem.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/pajuzitigotikulonarobufi.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/mulak.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/m9ra7fe3optdid6jfoivfemncg/53792766174.pdfIn PDF document text
    • http://turatabor.hu/media/39078349754.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/80136985279.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021052703472932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=anagram+of+timePDF 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_off0000f9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C2 17552 bytes
SHA-256: 5cd53cb384843c35bc0cfc78a04fcd662e187e0a2e415317f72971564e7df376
font_01_sfnt_off000126dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF3 10324 bytes
SHA-256: 0fde961ef73ed5c35ce1454e5c57b0d7ed1f5c555e4b4406760f987a05283b61

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