Malicious PDF — malware analysis report

Static analysis result for SHA-256 047d7b182895d138…

MALICIOUS

PDF

85.0 KB Created: 2021-09-18 18:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 43cefea0c2b0b4fef654d1a491786da8 SHA-1: fe0929aec31d08b20c7d08f330ef7e3e1432770e SHA-256: 047d7b182895d13839c2fdd0793673f269e7380a019568f4e6e79c2c023a6f7f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm with numerous external URLs, many of which are hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure point towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=kontrol+jarak+jauh+android PDF link annotation
    • http://modernplating.com/userfiles/file/23150200313.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/wugukobuvajugotedatikef.pdfIn PDF document text
    • https://searches.onlineconvey.com/userfiles/file/11887831233.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/34443756196.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/95738684735.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/xujiluk.pdfIn PDF document text
    • http://humanlitech.com/files/files/janezumiturojodotetijiri.pdfIn PDF document text
    • http://spiregene.com/image/files/20210910_083130.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb8622150d---zubazuxewilevixivazav.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/7097445569.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/92f0c47b80e54697880cee5778b58469/forozipobas.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles/file/60892209784.pdfIn PDF document text
    • https://kohphanganhotelandtour.com/userfiles/file/47219538905.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210902061750.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/91568336232.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/92856360671.pdfIn PDF document text
    • https://essuances.com/ckfinder/userfiles/files/98978433006.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/96840544768.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/xomatidurodumi.pdfIn PDF document text
    • https://borsalino.ro/imagini_ws/97288354043.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/nejogejugozuve.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/wovigixavafik.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/23176004594.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/rojaro.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_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BD 17608 bytes
SHA-256: 087f8ac854fa7da4975999165b8015f28a7e1e48a6f4ea35af44a748665007fa
font_02_sfnt_off00012edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDC 10356 bytes
SHA-256: a21e9b81c05fd7f4b68bd5996575b75a18a91b4db3a9fd8a509a257b0c3cf255