Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b45a90cfd66acbe…

MALICIOUS

PDF

76.5 KB Created: 2021-09-14 14:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eba8ae63d8b8f09feb482666dce113f4 SHA-1: facffe8a96c074625af309bdea56135a87fe83c0 SHA-256: 1b45a90cfd66acbe4201db8ff89050dd05a783da779431fb8d62ae5492d91e8d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to malicious sites, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://allytemp.ru/uplcv?utm_term=aapke+pyar+me+hum+savarne+lage+song PDF link annotation
    • http://studiophotosfashion.it/userfiles/files/77038355464.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/21749289439.pdfIn PDF document text
    • http://actinq.nl/upload/file/39904734834.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/nozevojanozo.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/21065048229.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/41359648279.pdfIn PDF document text
    • http://chinalabware.es/d/files/moxiguwefuni.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/99403558621.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/xulutinusafagi.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/6925066969.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/lofiwodakijogat.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/xusewajalivakasutogaloxeb.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/bolepanuso.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/babanibaganafex.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nemubimixitopakorif.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/xokizutu.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/161368333e51c9---vorixegumu.pdfIn PDF document text
    • http://ornito-silesia.eu/userfiles/file/71944338680.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/rafaxo.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/jisazuwilebigefamujix.pdfIn PDF document text
    • https://kiptep.ru/file/21726357717.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/balomo.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/17471480167.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383cfdc16b0---59799005906.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/53024037237.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_off0000bfa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA3 19704 bytes
SHA-256: db9eccb607662f020653c7a356f2a14badee7978f2df49044456cd0dd88ce1af
font_01_sfnt_off0000f381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF381 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B98 10864 bytes
SHA-256: 4093cbdd07151458584ca680e4cbc6d6236290b9a339a925571f89bfb16799d9