Malicious PDF — malware analysis report

Static analysis result for SHA-256 89cc7445953317e7…

MALICIOUS

PDF

83.4 KB Created: 2021-09-22 22:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f3f08de0d5694f4bb16257ada0938cd3 SHA-1: 8d0a0e480b97cbb0cb1d927161cab8cbc1acac73 SHA-256: 89cc7445953317e7b85d0cba53220332ab4cb58571ae415f1be9958fe295ce4f
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links strongly indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/50349319941.pdf In PDF document text
    • https://marljivo.hr/UserFiles/files/15075228767.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/kudotobovew.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/97935342234.pdfIn PDF document text
    • https://medbioplast.com/klucharnet/images/file/65552981139.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408cc53f37b---juropatumewawer.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb772ab7e3---woziwule.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/nuxuxodalibozuxinubibiko.pdfIn PDF document text
    • http://smirna.pl/files/file/35817471355.pdfIn PDF document text
    • http://swotaweb.com/img/upload/file/67475604933.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/sekubigisonijefaruwen.pdfIn PDF document text
    • https://preciseenergygroup.com/media/24860071313.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/48425225024.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161427a8ed8ad0---46373440.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/43889653150.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/zubonerawalogovuzi.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/zilitam.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/desevagemogakolu.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/sofefuxefamitejerifam.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/weselisinalonumuxozav.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109100348319211.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/99674728616.pdfIn PDF document text
    • https://maria-galland.ru/files/file/vowasanonebeleninekebutuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=bronfenbrenner+social+ecological+modelPDF 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_off0000e12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93E 17524 bytes
SHA-256: 460e3a4aef5551d09a71f9532b88383cdb590cf07fe44f250fcdaa2f67f9c3fb
font_02_sfnt_off000126fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FE 10912 bytes
SHA-256: b6c6236ad868757e4e9875dc310010f0b2c670905a43e275a068bb155b843669