Malicious PDF — malware analysis report

Static analysis result for SHA-256 5daece416a0f6eaf…

MALICIOUS

PDF

82.4 KB Created: 2021-09-14 08:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 802449bc4162699d99fc251346fea3eb SHA-1: 5d0ba24519397eb98c60d545173b0ec083fca9f3 SHA-256: 5daece416a0f6eaff33307dbaf06c142351d0d5e37e9cebcb34ac20ca59f2a3c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to other PDF files hosted on disposable domains, a common tactic for phishing or malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a method used to evade gateway security scans. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=gta+v+iso+ppsspp+file PDF link annotation
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffbe9dc994---zufomukazekivesa.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/58272492598.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/13943188505.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210909045146_g745yv.pdfIn PDF document text
    • http://euro-ex.net/images/blog/file/9310521546.pdfIn PDF document text
    • http://nhac.ditimchanly.org/Images_upload/files/luwurobakumidilaligipe.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/80273848235.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/29234666615.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/48562880180.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/fodetaw.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/66618305565.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/pudenakuliwefawipama.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/fowegozepedoxujibotibabas.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/gitusijodopir.pdfIn PDF document text
    • https://quatden.vn/webroot/img/files/20865313696.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/15231667303.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/zulelajumetilokag.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16134687c3b88d---49538323081.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/moxerulobu.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/32128948561.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/39702196158.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/fubuzerifalokuporoxumuves.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_off0000ddc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC3 18220 bytes
SHA-256: af45b0a716fe2b2aae03773cb9d95fcff8fdf00dcd7867c35361a2e34c988687
font_01_sfnt_off00010cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDD 10252 bytes
SHA-256: 386a760297aae395c5ca578efcf367d1f2dbde483d59ac507e543c4db3f8196c
font_02_sfnt_off00012427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12427 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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