Malicious PDF — malware analysis report

Static analysis result for SHA-256 47583daf6c035551…

MALICIOUS

PDF

80.1 KB Created: 2021-09-18 18:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 209f817c4fd84858d85bcd07cdf0eee9 SHA-1: 1fd9488a2d72b6fbb9cafbb178adeff5380c9d33 SHA-256: 47583daf6c035551da1eeb2fcdd4f38839511b91560cda12f5d3a04bf025197f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs and a heuristic firing for a 'link farm' on disposable hosting, suggesting an attempt to direct users to malicious content. The presence of a visual download button further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=send+mp3+from+android+to+iphone PDF link annotation
    • https://viboot.traigiongthuha.com/ckfinder/userfiles/files/jenusefiluwow.pdfIn PDF document text
    • http://slsnn.ru/content/files/81812329959.pdfIn PDF document text
    • http://unitekinfostructures.com/userfiles/file/roduralekarep.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/sofovijazojafimeme.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/19577071152.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/87157685258.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/mepewuturuziluxo.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/dexoxorove.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/vujidadadisexob.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/39233147790.pdfIn PDF document text
    • http://mama-care.com/UserFiles/file/3691106306.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/dumelepagatege.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c72500d9a---bafosonigatuz.pdfIn PDF document text
    • https://loppisidjupdalen.se/images/uploaded/file/59883714211.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/75234587561.pdfIn PDF document text
    • https://emenu.hu/editor_up/jivisizokuvu.pdfIn PDF document text
    • http://lg-palette.com/upload/files/gapoxifudavud.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/vanigafunamepefates.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/fdc0a803ef255449074b36337c2c17fd/dewibebomakesux.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/69691796300.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/14874834015.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210915205008.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_off0000d0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E4 10796 bytes
SHA-256: 7a3283229924b3faa8c88ddef97292dfe9b9d6c12424edf253df5ecaf5920635
font_01_sfnt_off0000e992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE992 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A4 19124 bytes
SHA-256: 6e6fab335cd73e417ee930656f1d8f0462ed097a089dfcafd527694e659ed6b4

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