Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fcc347413ee09c…

MALICIOUS

PDF

82.9 KB Created: 2021-09-13 05:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a21f55edc99c56ec1a0834d73517786e SHA-1: fd3f1f90ce46565e88faa67ddb5a11ca15ad63a3 SHA-256: 27fcc347413ee09ce737e2340594a2bcf5604a45cc3e7a4f5a82e92595c44de6
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of a 'utm_term' parameter in one URL further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://philabc.ru/uplcv?utm_term=dragon+city+mod+menu+2021 PDF link annotation
    • http://canadanur.com/resimler/files/wodoxefusutal.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/lejelosumobexumoginape.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/13440256884.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/jeborerakobejoluxub.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/jukowajedexutadovu.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/rekidifiz.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/1b82811188f225df87cc078fe0a9f815/gujojiwewavep.pdfIn PDF document text
    • http://northcity.rs/slike/files/27580865068.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/2e1bbafab3b1ba8f536195f4e1ceb8d3/lavan.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab8edcfdfa---lifipewig.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613716b922801---suwef.pdfIn PDF document text
    • https://nevisnews.com/userfiles/47390692768.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/49499785856.pdfIn PDF document text
    • http://travel-door.com/userfiles/file/59207713303.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/fodekifipepipezelufijakif.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/92856704774.pdfIn PDF document text
    • http://markone-tools.com/upload/files/vimumug.pdfIn PDF document text
    • http://pincesorvarshop.hu/editor_up/52563202976.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/60636275259.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/64255387962.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/kebikeberabunude.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/xowodewowodot.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/7200105336.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_off0000de1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1B 11008 bytes
SHA-256: 2108a60d1ff69ab2dc43c67d8cf716c042f9fad3a7df81cc7df3a0b625c92479
font_01_sfnt_off0000f78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78F 17840 bytes
SHA-256: e7f889200f2d1af89b720d26b7e3c23747e13406ec97e449a5f847f7de663154
font_02_sfnt_off0001261f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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