Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe2284f9079934a…

MALICIOUS

PDF

72.4 KB Created: 2021-09-26 10:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2fe3034eb7a9d87985b152bb32e02ddd SHA-1: 789a07d638aeffc7e74b57f9721f3a56ffaca2ef SHA-256: abe2284f9079934aa1ddfd34240a64f9433259b066db852e8bd3163ea206af82
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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 https://smidgel.ru/uplcv?utm_term=lego+marvel+avengers+for+android PDF link annotation
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/jujumemupazazepaw.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/rizivuweredegeruv.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/rajito.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/161418c9c29cb7---29956083875.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/ed7a8eda7f54b4c72e10f5e1b2040485/fonizoputadabimut.pdfIn PDF document text
    • http://hmsendo.pl/uploads/editor/file/jupojutubawenaziwoxulexu.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423778c8235---zajixewam.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/37806321361.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/zuledas.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/jewizeguwizaw.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/mokokuguvugoboberuwita.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16149d009a56ae---jifikezijafax.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/opb496jkqfr4ngsp9s5rtu54mk/lenani.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/jopagomoxajasejuvulato.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613916a5b3e4d---42155393475.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/21273543592.pdfIn PDF document text
    • https://ancoraeducacion.com/images/ledukovor.pdfIn PDF document text
    • https://encoyun.com/calisma2/files/uploads/duvulabulefilijegotojuvew.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/43491903876.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/rimosaxapode.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/voziwalamupepuxe.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/kekugemoxavusu.pdfIn PDF document text
    • http://roleco.pl/data/aktualnosci_imgs/file/ronadujibi.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614afc49d0ac4---tidawezajajivimomoruxuku.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/94152603913.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/14894056463.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/88247219795.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_off0000b516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB516 18880 bytes
SHA-256: 08147ff0d1f6fba498bc632c899bff70357831ab03cbd0d05df02818fb502747
font_01_sfnt_off0000e3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 10624 bytes
SHA-256: 41517539bca2fed5b0331e83c4fe97037fee5c959865b58b4446e67c8a2fecb3

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