Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a347982b2cd0b2…

MALICIOUS

PDF

81.9 KB Created: 2021-09-18 06:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 74641dce8ca15a768b5ee107cc300cb3 SHA-1: b8894ca5bfc20a6a281a926aef36d50e63226e57 SHA-256: 62a347982b2cd0b25790bfb7f24899b30137476bc1e9cfa14b8f0fb7b68d3a6c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of 'utm_term=download' in one URL further supports the idea of a deceptive download prompt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5b271c191e94d17f81e25929a914d089/53887961910.pdf In PDF document text
    • http://aan.kz/ckfinder/userfiles/files/kagap.pdfIn PDF document text
    • http://secretinvitation.net/images/files/94244416203.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/34709536730.pdfIn PDF document text
    • http://ropesadventure.com/d/files/surizapususotibijupe.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/fosukudo.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/goxowo.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/redukusigosatu.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/wotilej.pdfIn PDF document text
    • http://aviafond.ru/userfiles/file/mapapanexijaxosar.pdfIn PDF document text
    • http://bajkolandia-leszno.pl/userfiles/file/fifimoxipojuremoleb.pdfIn PDF document text
    • http://nensi.si/upload/file/5152067631.pdfIn PDF document text
    • https://alternativi.brtim.com/uploads/wysiwyg/files/xipibujowasigedeg.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/daludarado.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/rasurekomepefoda.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/debazelerutukijixow.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/detesabelilon.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/giguguma.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/ludazisalakavonisijugu.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/68980456261.pdfIn PDF document text
    • http://jsdarvin.com/files/88987122356.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161441a86be354---34101287391.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/6239323908.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=download+wild+rift+androidPDF link annotation
    • 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_off0000dab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB3 10132 bytes
SHA-256: 6280b4207589c71841bbc447886f0d04491f27da3c45ad7c54ae47cbfd7ead2b
font_01_sfnt_off0000f16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16B 18660 bytes
SHA-256: a1ce6aded97b9d3e94926d28b832ad96d7207c677b413bc0971e952ebffb77cf
font_02_sfnt_off00012233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12233 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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