Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a0892212b45b08…

MALICIOUS

PDF

85.5 KB Created: 2021-09-22 15:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ddb8db3b1baa24133c5aae54d4239403 SHA-1: 4804e5e8e6e0285954610fcfbc543f67c9d9d4b7 SHA-256: 67a0892212b45b086f420fa3b30e2376e9f5389c621a0068ef2f946790e65709
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, with one pointing to a raw IP address, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly support this assessment. The presence of JavaScript suggests an attempt to execute code or redirect the user, likely as part of a phishing or malware delivery chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ijdssymposium.eu/upload/47510459454.pdf In PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/5675842021.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/tonekilugajexuzunigete.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/96208047049.pdfIn PDF document text
    • https://franchiseinnovations.org/broker-site/files/files/33289012096.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/fuvalemebogu.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/nofeluronipuzewukokizew.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/92463756691.pdfIn PDF document text
    • https://foulardfotografando.it/file/jowitemuno.pdfIn PDF document text
    • http://budropol.de/Upload/file/deraf.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/80226074765.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/gotipekelosug.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/76803111567.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/68655159948.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/39195646270.pdfPDF link annotation
    • https://dolmalatrek.com/userfiles/file/turiboni.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/51098060361.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/79014967077.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/japobaxaj.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16141287864f21---6252285812.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/fajeru.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/45868050802.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16143d9f5c200b---30619651106.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/kelalajavu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=android+device+manager+locate+phonePDF 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_off0000e640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE640 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 18772 bytes
SHA-256: b657ddafb0ecf39bcf56c968058282eadc4e9c63b3753d5c2141b48d7bf772c5
font_02_sfnt_off00012fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD1 10840 bytes
SHA-256: 13ccb7d69240da6fe6fb917f805a7f4e0b38d4faa6b6d9957a5e377ca160bbc6