Malicious PDF — malware analysis report

Static analysis result for SHA-256 056acdffb9542fe1…

MALICIOUS

PDF

74.2 KB Created: 2021-09-22 20:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 32c7fbaae5e520a7294436f929590568 SHA-1: 08b44c30f9bde53c7b8f5dc40b7c04b0992ec7fe SHA-256: 056acdffb9542fe1eac6e4ebc60d1fc54a18855b7fa24899856598ec92104893
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=pokemon+emerald+repel+cheat PDF link annotation
    • http://erex.hu/upload/file/69827184347.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/68331939505.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161433e0517e1c---9504142729.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/fibexuzuxudedez.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/befipiwalejaxev.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/55607245703.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/rufitebilut.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/31387797525.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/92647778378.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///94724397121.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/15699038683.pdfIn PDF document text
    • http://bjjiffy.com/upload/88414429384.pdfIn PDF document text
    • http://iphysiology.ru/upload/76545064603.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/jozepimifize.pdfIn PDF document text
    • http://caramelitos.sk/files/tojeginatenos.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/lamenase.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/fitabemoxoge.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/76114793761.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/32835364326.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161432245762be---javafa.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/54321351888.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/30116440416.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/bimavuwusujetip.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_off0000be52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE52 10612 bytes
SHA-256: e4ae24ceb82197a22745cb38a0f9e8ad640b89d125a2d69f2a0adcd500f7414d
font_01_sfnt_off0000d65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65A 17432 bytes
SHA-256: c0e3ce74b627c3da69a9d4229c48c62fda2dbe726d6c96830b165fe065564e32
font_02_sfnt_off000103ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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