Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0aaca7570881f49…

MALICIOUS

PDF

70.0 KB Created: 2021-09-26 01:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 89f5ab71fe5f853389504ae739c712bc SHA-1: e38ddcf3be9839ab5c195165c23de8be84c0ad98 SHA-256: d0aaca7570881f4969fc036ba205d55a95005cd30bcbae683d31f47cc5d58a1b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains, characteristic of phishing or malware distribution schemes. The presence of external URIs and the link farm heuristic strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://smidgel.ru/uplcv?utm_term=samsung+galaxy+a31+vs+iphone+7 PDF link annotation
    • http://komodovo.ru/upload_picture/gemavuturukuzetaniko.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/kapusovotebazedibuvewi.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/12242167474.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/siwaku.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/202195006.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/fezibozolomapalivo.pdfIn PDF document text
    • http://maybaobidinhdinh.com/upload/files/69279076055.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/kuvoje.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613f22f3eff43---nenuwuwibiwekorud.pdfIn PDF document text
    • https://shevian.com/images/file/wawujuke.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/zodutipusodab.pdfIn PDF document text
    • http://goghepcacloai.com/media/ftp/file/64363529429.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/natugixu.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/14344943180.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/xozebabewibigumepavela.pdfIn PDF document text
    • http://highlevel.pl/userfiles/file/kufos.pdfIn PDF document text
    • http://awards.nl/img/cms/file/zoxux.pdfIn PDF document text
    • https://dragonexpressml.apnaconsultant.com/userfiles/files/mazifoferurexafawe.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/zokuvibuwinabapiluti.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/fodusepimibofijokuzozokag.pdfIn PDF document text
    • http://kk-gorenjska.si/uporabnik/file/11675874005.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/98151037387.pdfIn PDF document text
    • http://brno-skoleni.cz/ckfinder/userfiles/files/66891780648.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed3fdd16de---nogafegoniwojitaguf.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/radisodokebovotofibivu.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_off0000b282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB282 11232 bytes
SHA-256: 4fc97c9d4df663f55b9bc0983bd2068269499c8a435992b540fb77e45a3e964d
font_01_sfnt_off0000ccbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBB 14876 bytes
SHA-256: 3f68d3e85aee881a858147ec745a377ba53cd8908c73e590697d780333228fae
font_02_sfnt_off0000f1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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