Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9daddc70912050…

MALICIOUS

PDF

70.6 KB Created: 2021-10-03 00:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a7c97e909635e63267a8cedaa1d7de31 SHA-1: 076b361b3f85b5086b7647b9c98470a1a607e4c9 SHA-256: 0f9daddc709120508fa73e67dccba68ac18799d98286823d459dbcd9376c8dd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting. The PDF structure and embedded URIs suggest it is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=geometric+sequence+example+with+solution PDF link annotation
    • https://listapp.in/ci/userfiles/files/xajel.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/22566721664.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/wiburabaxozedonujav.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/65521707973.pdfIn PDF document text
    • https://oreopay58.com/ckfinder/userfiles/files/20856399741.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/wibodul.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/0594dbd9a1ce9c3b7b77f94792098cce/9724468416.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/21816351081.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/zinike.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/46065959729.pdfIn PDF document text
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/70270225416.pdfIn PDF document text
    • http://telektrans.hu/editor_up/gosunezopufuxetemitapo.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/52017257429.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/f8d4455a6e8bf1211efcf5071a67d8de/pewuwumiwef.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/552828591.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/safamusuzovogowelabetan.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/161418584e0f05---24592840748.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/71967088579.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/98516713037.pdfIn PDF document text
    • http://metabolizmusonline.hu/images/upload/file/bowezaka.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/telovukebemaxuli.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210908102742.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/19925465172.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/vuletevipupipixazowulivo.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_off0000b26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB26A 15848 bytes
SHA-256: 1d4e10b261c8eefe6351f0b714ef39edccc8f788c74c2b17b8326146d8dd1c6d
font_01_sfnt_off0000da52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA52 11112 bytes
SHA-256: 7ddf36ca28aeb1b5a0fec0643ef3b5818a3e76743cac4071d6101d93e4d58290
font_02_sfnt_off0000f429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF429 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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