Malicious PDF — malware analysis report

Static analysis result for SHA-256 9678ec0b76ea85ea…

MALICIOUS

PDF

82.1 KB Created: 2021-09-16 05:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7692343c4a67cb58a6acd2a8cc0f4443 SHA-1: 73c96e88ec3942c54de477546dd66044570bb482 SHA-256: 9678ec0b76ea85ea91965f858a75545dbde83882e55a74bb023072d2e64c1c91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was identified as malicious by a ML classifier and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/41747215573.pdf
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/romakovu.pdf
    • https://cambodiadriverservice.com/userfiles/file/76354826940.pdf
    • https://trompis-tondschungel.de/userfiles/file/16285212350.pdf
    • http://gzsjlt.cn/userfiles/file/8916452087.pdf
    • https://mandarinusa.com/userfiles/file/1631755104.pdf
    • http://share-world.tw/userfiles/file/38950683439.pdf
    • http://shopphutungmayphat.com/upload/img/files/8923338467.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd72c144a4---83787711103.pdf
    • http://theseadiaries.com/ckfinder/userfiles/files/48857979808.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130df8910f41---4852497710.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b49180390---67898641284.pdf
    • http://koreanhotpot.com/uploads/files/sanuk.pdf
    • https://hongmao.tw/uploads/files/202109100953295518.pdf
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/wafawafeva.pdf
    • https://mimpiindah168.com/contents/files/12145796994.pdf
    • http://sitarofindiamd.com/userfiles/file/suxapivinuzavazijat.pdf
    • https://lorus.rs/files/pejebonoluruge.pdf
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/33710038817.pdf
    • http://liveisagenix.com/ckfinder/userfiles/files/99433942837.pdf
    • http://abwfinlay.com/uploads/files/65857132099.pdf
    • https://yodishit.com/uploads/userfiles/file/86598379666.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=phone+java+apps
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd82.bin
d38fa2daf535686075bad84cacb8295e811319efa36b6a6741623ca72d40ccc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD82 18092 bytes
font_01_sfnt_off00010c3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3A 16792 bytes
font_02_sfnt_off00012451.bin
9cec3c3857859a6cd73fcaa4fefb787f6f4981c858eb264a2d3eb9c617e241f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12451 10212 bytes

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