Malicious PDF — malware analysis report

Static analysis result for SHA-256 02770a3d2c9a8318…

MALICIOUS

PDF

76.6 KB Created: 2021-09-12 04:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 40b41e2b7a3ef992075c1e562b4e0df6 SHA-1: 42386bc90e64f772b210b2e8a9b1e09e05b6f33e SHA-256: 02770a3d2c9a8318d7369fab0d1eb97f2cf57fbd87d4782bac50d4ac83618bfa
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute further malicious content or phish users. The presence of numerous external URIs and a link farm on potentially compromised CMS uploads strongly supports a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ibookingkr.com/FileData/ckfinder/files/20210903_C48DE3DF593EF381.pdf In PDF document text
    • http://poiskvod.ru/images/file/baforoduw.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/delanizogaxu.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/kutuvuri.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/kinigokibimabewaf.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/70425257472.pdfIn PDF document text
    • http://davobio.com/upload/files/70945368270.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d410c2da0a---segedu.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/63635973273.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b567e86189---zoxopefizenaro.pdfIn PDF document text
    • http://one9five.com/userfiles/files/wuvogipurewujefefepototer.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/31110212357.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/nudajoxerakipowomuw.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/19518164714.pdfIn PDF document text
    • http://dison.cn/filespath/files/20210909235457.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/75edbc429a343506031c739e4cf4e751/tuxumevamelejejajoxe.pdfIn PDF document text
    • http://topstec.com/d/files/65943741724.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/51slv31duj57p89sjirsjt0d7d/66704718160.pdfIn PDF document text
    • http://huiking.cn/uploads/file/07163727916.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16135d6e5af026---44869827578.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mjd9srj2469ef8s4q76jci1jk2/30768129294.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/rotesidijozuvup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=picsart+mod+apk+pro+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC819 17380 bytes
SHA-256: 2fe42ee6fc193510aa3f72ce68c9c90a87313102f3fde68ea06a4c9ec5a37349
font_01_sfnt_off0000f4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C6 10720 bytes
SHA-256: 567abc6ed90849cb4bde08d8b5c1331792e68de7ad7c5ab6f7f16eaf2d24f32e
font_02_sfnt_off00010d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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