Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e7f17889935138…

MALICIOUS

PDF

82.4 KB Created: 2021-09-18 13:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 209be8b053db889174671384af29672c SHA-1: ef18742ff7ba88909e026def3204372f4934b74a SHA-256: 38e7f1788993513813d92610a3b714e6f9a1c98753fead213821969430ded709
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious lure, likely intended to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://chcial.ru/uplcv?utm_term=fifty+shades+freed+watch+full+movie PDF link annotation
    • http://lt101shop.com/userfiles/files/vogimidunimolasufesiti.pdfIn PDF document text
    • http://agro-partner.com/Image/files/nevisagi.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/8793220888.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/gixafogixufisow.pdfIn PDF document text
    • http://sourceandsecure.com/uploads/userfiles/file/kivolanefizojivezid.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/43141621853.pdfIn PDF document text
    • http://0851gay.org/userfiles/202109file/2021090610573070554.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/60157651041.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/mifopitemivi.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/83430491763.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/pixuvulisaf.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/ganuj.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/58393053801.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/ronavazikadusajosotete.pdfIn PDF document text
    • http://oodow.cn/upload/file/210916093329232004uygru539hvgg.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/f89d790b9626eb46a996c797e6635bef/vusawututusunefamajel.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/jikijiwifupoxu.pdfIn PDF document text
    • https://fratellifurloni.it/file/25119285699.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/zomomevozubojujofidupira.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/89143918393.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/divugixuwanudazejom.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_off0000de0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0B 10980 bytes
SHA-256: bb77f2ff5441fafa2427f4e5937f0d394d85cfb93e982613cad1477acf41b711
font_01_sfnt_off0000f798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF798 17244 bytes
SHA-256: 5ce21f807f3efe3e852a10f10a06c4c47a6cdda26c0eb0e10a7de19226e62ec5
font_02_sfnt_off000123e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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