Malicious PDF — malware analysis report

Static analysis result for SHA-256 655705292e015e8f…

MALICIOUS

PDF

70.9 KB Created: 2021-10-02 21:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d619590058cea9cca1e1b48801350b00 SHA-1: 17f72fb681293d11e42d93543cf0afdbb58f1813 SHA-256: 655705292e015e8f5fb61785a8342a53cc056007d7b934a343fd4fc809e5b58a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, suggesting it's designed to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports that this PDF is part of a link farm, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://queure.ru/uplcv?utm_term=pdf+export+to+powerpoint PDF link annotation
    • http://canadapremiumlubes.com/survey/userfiles/files/31977489141.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/8886014251.pdfIn PDF document text
    • http://kondicionery-lobnya.ru/upload_picture/file/60704113326.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/74244240133.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/jawelex.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/75981102804.pdfIn PDF document text
    • http://scsychem.com/upload/files/pikepa.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/gozelebakikosexi.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/zepikugo.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/71583528245.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/b7cc2a1699994eef2bed105ed3dfa13a/69176521243.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/35562328608.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/19977491102.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/ragelaxazeradevalijufaz.pdfPDF link annotation
    • http://cuadepthanglong.com/images/ckeditor/files/takevutiraxop.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/16939277710.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/norum.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/66377656018.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/76215894494.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/woxesokirav.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/wetuzerugixegodij.pdfIn PDF document text
    • https://objednavky.dortovapohotovost.cz/obrazky/files/67564092828.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/tategibekix.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/bijowilejukaz.pdfIn PDF document text
    • http://momsystem.ru/public/file/zimetineteneg.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_off0000b42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42C 16608 bytes
SHA-256: 034c7cd7b62a894265c609e4b27845ebbc21876033ac33e0cf068b9a694b1787
font_01_sfnt_off0000de53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE53 10304 bytes
SHA-256: d58c10ee7f977b1b528073750343755e80401426f1d39b3d1c29e0bf4689737a
font_02_sfnt_off0000f5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1