Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f8d92b02142ebc7…

MALICIOUS

PDF

85.0 KB Created: 2021-09-01 02:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2fbd696216bb8ac9b3766c2d957411ca SHA-1: 51e48bc3f6b094305f672e7bd2e74f148bef331d SHA-256: 1f8d92b02142ebc7b0976a666aa859544482ca53b5bd4ecebaefa7e5b8fe170a
156 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to various hosting sites, many of which appear to be compromised WordPress installations. The presence of a search term related to 'football manager hack apk' suggests a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://optykglowacki.pl/obrazki/files/80324382813.pdf In PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/5077r1p472robgrden9qnuc1s9/vovevibopexi.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/renaxoredatoruvifakadib.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607216ba1eb6a---difeperijiwo.pdfIn PDF document text
    • https://aildf.in/userfiles/file/31815232888.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b7aa4371eaaf25056618884b79e3d016/59348317093.pdfIn PDF document text
    • http://biomehl.com/images/content/files/73485638697.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609aa1f986161---17493225984.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/73208080408.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/47972511600.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/59vjoupms9pdfp5ri29r80q99p/66233227629.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/80c159370f63b9479c1226b9f9c8098d/guget.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/11633673422.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1310ba079b---41436815373.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e89da7821---24387096705.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/68423542425.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tizapizedurakixub.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/kisikijativuwi.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4e4c9f346---dedon.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b26302a6ec4---livevan.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/8453383514.pdfIn PDF document text
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/rasupifoti.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/kerewaf.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/5otgksdlcde2ocjoacg2uk6ce7/31724316220.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/233965258.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/38966503400.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=football+manager+hack+apkPDF 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_off0000e27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA92 10768 bytes
SHA-256: 68dcd4a80daf1fd66f928df47add9e50a97272210c9270fb4cbef5c57798f8e0
font_02_sfnt_off000112f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F4 19508 bytes
SHA-256: 65074e2c931452fe81297ee9d27c4ebcf92771b12f606a80130aad2897323a27

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