Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7dc40a7079f32a…

MALICIOUS

PDF

84.6 KB Created: 2021-10-06 14:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5c61fa647f9a5cc92a749eb0b7b61454 SHA-1: a4612f4f15b04026137eee3ef0c937164c2defa5 SHA-256: eb7dc40a7079f32aaa77dec227cce523041a3c1392cb66fee2e22719f4bb23df
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • 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 http://alexdisinfestazioni.com/userfiles/files/melazadipebopeveke.pdf In PDF document text
    • https://storycycle.com/ckfinder/userfiles/files/rarifofekonuloteni.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/zozijetenetamigarede.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/45452231901.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/xemikuzekegababuvimusolon.pdfIn PDF document text
    • http://wawa757.com/uploads/files/44456527237.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/74491845548.pdfIn PDF document text
    • http://baovekhucongnghiep.com/upload/files/busikuvuzajegivetalosepu.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/vuwegavevuda.pdfIn PDF document text
    • http://mp-journal.com/media/file/babizaviwuvowovet.pdfIn PDF document text
    • http://etkenkalip.com/files/7979722790.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/20756135707.pdfIn PDF document text
    • http://iucecb.com/files/file/zebajukuziwesogifoj.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/subexirut.pdfIn PDF document text
    • https://8cj2aja7-8mxb.com/contents/files/27789392841.pdfIn PDF document text
    • https://szpital-sulecin.pl/images/fckfiles/file/63168321135.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/kitonirafugumefufowubego.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/75785446941.pdfIn PDF document text
    • http://lednotice.com/userData/board/file/52385483555.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/75456774801.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/dozoluviborupakowase.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/moniwakevufovoleza.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/feganewanizijosujegalol.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/57383846660.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c18900b348---fagalibilit.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/musezakasulixi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=numerology+9+compatibilityPDF 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://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_off0000e7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBB 17820 bytes
SHA-256: ae6e130d6d7ab576a2189fbd3ae5728124582ece358faa61e1acf9feb6b5b483
font_02_sfnt_off00012ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE5 10944 bytes
SHA-256: 755d229a08041a5b44c3e7e8f58aeeb13b15b25c9c5e4e52fea5dccebd073ee6