Malicious PDF — malware analysis report

Static analysis result for SHA-256 a58f55877cf9756c…

MALICIOUS

PDF

75.5 KB Created: 2021-09-21 09:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8395397454c7539d5a881da0395528e2 SHA-1: 870938d4fc19c5fcaa6372c5b473072e32b8b042 SHA-256: a58f55877cf9756ccf930e0c5e8b60565b201b617ab61fc29bbafdd4bda24698
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous external URIs, including a link farm on disposable hosting, suggests an attempt to redirect users to malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://archism.ru/uplcv?utm_term=zapya+apk+for+android+4.4+2 PDF link annotation
    • http://actybrain-consult.com/Upload/files/tizamuburigomugal.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161493177b5748---63115076173.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/butegumemufo.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/sebabisotizizuvewifa.pdfIn PDF document text
    • http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/vumoko.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/jupedovole.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/zomegifotesobevetol.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/81294935984.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/jofuxalofedemepaju.pdfIn PDF document text
    • http://conditum.nl/userfiles/file/97144207309.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612f184bd4b19---puzusajakas.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/21295876513.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/tafoxodirubo.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/xepolajalijegine.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/lijuvuraxugunomuxek.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/xesuzupateratoxusikasoti.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/nurididawula.pdfIn PDF document text
    • https://harmony.im/userfiles/file/lijujakonikeba.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/kararoneretofobazupu.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_off0000c302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC302 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB14 17756 bytes
SHA-256: e9695f2becc56e4ada71c76b9e3b83058336d5b704e30080ab147a9ecfba6e4a
font_02_sfnt_off0001092e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092E 10480 bytes
SHA-256: d7e7e9dca891f5fff48099cb75602866ea88295b3d1dfb730f0adec4c6c45bb4

Open this report in the interactive analyzer, or submit your own file for analysis.