Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d3414cc02a969b…

MALICIOUS

PDF

83.2 KB Created: 2021-08-21 05:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d56cbdee578d29c5c9413db8cebd0c2d SHA-1: 3499afb5fdffd096b64a6baf307e8a6d6f2c2182 SHA-256: 75d3414cc02a969baa9bd35511a81a21b40bb0d218caebc11e138fad75659b8f
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains, which is a common tactic for phishing or malware distribution. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggests the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://boucherienabli.com/uploads/FCK_files/file/morigaxevoz.pdf In PDF document text
    • https://shopabrang.com/images/files/pifenufotiminativitefoni.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/1e247928e65c47083d11c44204a21522/bowuloteluzipewopasamap.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/o1c1hdmcblbnp267h8fi1ttuj7/raxokazozakarekunag.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/46821665864.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/30442522163.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/83497917249.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a389d2203a8---wemazefomuvasu.pdfIn PDF document text
    • http://keacg.com/upload/files/geriboresosanodojo.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/50164747753.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/fakovovebix.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/geperibixukamazafulo.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/46334460422.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/tjrjjnultujhg20i8gfs2v5j5k/lugokefimoxalonivexobi.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/fevuzopufirimobazajaz.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/robolemupoxolezufiwegepa.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/rojibobepoxa.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/dugufot.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/32932292789.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/vuzemijetubiw.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/b5a10debc37ce3d02717d1ba78f5c05d/kazozomuboxinusaxe.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d9499787e---2120000790.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce79360018---pagofubefareb.pdfIn PDF document text
    • https://medtek.vn/storage/file/17291529183.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/gusilo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=facebook+lite+apk+download+new+versionPDF 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_off0000e01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01F 17340 bytes
SHA-256: 3e2b8eaa9fed3d88c63e5af3662c2663b7558ccda7ff9b94d1c0541d3a360218
font_01_sfnt_off00010d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D67 10868 bytes
SHA-256: 63af41f84c782217c99bc457435c07bc4a3d1353f0d6f48bdc37dba56e89f7a2
font_02_sfnt_off0001267e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.