Malicious PDF — malware analysis report

Static analysis result for SHA-256 656a7c753cec8529…

MALICIOUS

PDF

80.3 KB Created: 2021-09-05 02:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bf0d99768f941cea7f26d614f3ca5e71 SHA-1: dcc90c5a91a5e04220be866e1418c0a27a4aacbf SHA-256: 656a7c753cec85296525ed5fd91c37cdc14ec994e98797b7229530af2ce9c3c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on compromised CMS uploads or disposable domains, indicating a link farm or distribution mechanism. The primary purpose appears to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://abbuffalowings.com/uploads/files/34962890046.pdf In PDF document text
    • http://asia-test.informacittadino.net/media/files/juzusarokexu.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/18828615207.pdfIn PDF document text
    • http://incucinaconalberta.com/userfiles/files/wuget.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/62196566211.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/2750e793597f35774dfb03b4a6434d54/14105293210.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/58145946713.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da644558aa---lididilazexilof.pdfIn PDF document text
    • https://ijpdua.com/contents//files/xunarunenebapuf.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/40058022745.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/ced85ae6f366c3702fdc2bfed7bf3334/lanezodolojosu.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/sovulisaj.pdfIn PDF document text
    • https://usdcp.jp/user_data/userfiles/files/dunasolofujutarapek.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1612399c963d5c---71640897463.pdfIn PDF document text
    • http://mylodge-naoshima.com/vudera.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/112a1a7699db0dc1b87ec7e51b4d3743/zepanupikikepigawomifop.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854b142b13f---zonorixunofapuvumibowug.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/12633676109.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/23547899174.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/037cb84dae4519bc71dee16a4a1489bd/vubojivura.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/p0jaonbgjmkkpfmevliuba0s13/tusipipituzamenonuziwogo.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/n51qpf52qh1rj96em0afh2vp2h/3570799922.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/r9di76o8j9ua37iljs379djr7p/44667381374.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/pevawagot.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/28845709280.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=panasonic+ncr18650ga+pdfPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/5d2f25546081f65b8d8d57bbc0c2c242/zejubafopatuganawimovale.pdfIn PDF document text
    • 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_off0000d32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 11204 bytes
SHA-256: 75e42a37a553cfdf699dd97a834a1e41cd8d2a925ba2fd43c448d08e07d3f033
font_02_sfnt_off00010577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10577 17548 bytes
SHA-256: 33ff4d587738428c633d4c79ea0ec74ccf93449397e307eedcfacb2f80c4551a

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