Malicious PDF — malware analysis report

Static analysis result for SHA-256 d441cee94d703a0c…

MALICIOUS

PDF

78.0 KB Created: 2021-09-13 02:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4c6c49155e07f4b6ae0e56693c850fde SHA-1: 486e7c69ce8c99cdc12a5a9a93ff43b8144b716b SHA-256: d441cee94d703a0c578e281d07720a96aa683c2ac771f80418a8676b1788e98c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable or compromised domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple links to PDF files on various domains suggests an attempt to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • 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 http://greenflameenergy.com/userfiles/file/bilosuzisofelajaxavid.pdf In PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/62919621057.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/tuporodisogilurutum.pdfIn PDF document text
    • https://mangallagn.com/images/file/rubevamotulojoxix.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/xifosavonexus.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/pesexazilonazobeg.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cadc792b1a---49682225944.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/8238576955.pdfIn PDF document text
    • http://casms.org/atts/news-files/file/jolatodetunivufesomev.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/67958477102.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/jidukegejojapiduga.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613679614f7f5---64145183475.pdfIn PDF document text
    • https://www.truck-transport.com/ckfinder/userfiles/files/26458585283.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/57551753300.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/67950967785.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/jovovawobezomusuvidosaxa.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210901064852930918.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/lanufupawilemamazepitiga.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd31d0bbf9---69030381498.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/vitipur.pdfIn PDF document text
    • http://tuivaivietnam.com/uploads/files/xedufeluxirulelorub.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca2324d7f6---febedolugagogi.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/jatidawijivokemora.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/furakijelesalodopavazejuz.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/nuxabejukib.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/94836381530.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=reading+explorer+4+third+edition+pdfPDF 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_off0000cbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC1 10836 bytes
SHA-256: cdfd2257fcd6b1e3ef75603a82889488a229138b19185a8731b8aafc67b3aa6b
font_01_sfnt_off0000e477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE477 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC89 17784 bytes
SHA-256: 09c17e7470c328f10dc9333773fdc8294df17826d9ecc39e565017748a0fabc7

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