Malicious PDF — malware analysis report

Static analysis result for SHA-256 e778f003567d9b2c…

MALICIOUS

PDF

80.9 KB Created: 2021-09-19 02:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 58b5bf74ef605c2a44591e0750462e41 SHA-1: f39aef9e908b57791b413b67a315d182fce654ff SHA-256: e778f003567d9b2c2b8ba5955d8dd2502befecc8d05c384aabfea380581bae55
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating a malicious intent to redirect the user. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution attempt. The presence of embedded JavaScript (T1059.007) is a key indicator of malicious functionality within the PDF.

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://baggiez.net/userfiles/file/fekolirufafugiwaxexuvonoz.pdf In PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16133d59e5da54---91908041379.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/28737879787.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/44240279652.pdfIn PDF document text
    • http://kaie.org/userfiles/file/20210913062229.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/98736035825.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/50589321233.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/gisidelasuzux.pdfIn PDF document text
    • https://www.lucaslobker.com/minor/ckfinder/userfiles/files/91150408145.pdfIn PDF document text
    • https://spacio.hk/attachment/file/11982919922.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/35028312011.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/gagijulivetozel.pdfIn PDF document text
    • http://yoga-privates.com/yoga-privates/file/41027144784.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/21957318039.pdfPDF link annotation
    • http://ohdiabo.net/images/ckeditor/files/wuwavumamezax.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/korosujesax.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/18636037098.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/nokesirotoxelojuzebotafef.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614664dddb19a---99730345809.pdfIn PDF document text
    • http://vinacafe-dalat.com/Images_upload/files/1038600851.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/31930303302.pdfIn PDF document text
    • https://rgcsmt.org/ckfinder/userfiles/files/jisubujukiwor.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/79951601164.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=higgs+domino+appPDF 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_off0000d698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD698 18672 bytes
SHA-256: 774a195b71bc2902a74723a47fa7555ba01ba5c0e54fc35697d4b0d559385461
font_01_sfnt_off000106d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEE 10352 bytes
SHA-256: 8f25dc286357a3e1f1c141da1545c68eed2fd912db091bdce72a9919f5cfc8a0