Malicious PDF — malware analysis report

Static analysis result for SHA-256 b696849c9ca08dff…

MALICIOUS

PDF

78.6 KB Created: 2021-09-14 20:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 01885eae1624e207f4d4a7b601bf0bea SHA-1: 34bb29e8d2297a611c20de3d22ca61792b8e803d SHA-256: b696849c9ca08dffee62f11a0c7573274a609239221a334458b75110cb50e4be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

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 http://cjmfgx.morefriendship.com/upload/files/38188025647.pdf In PDF document text
    • https://groupunsur4.com/contents/files/7982953608.pdfIn PDF document text
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/30006217967.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/wetedemozededijer.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/52778057952.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/1381712961.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/43727311913.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f750ef7793962b145d7de51f30e326fe/16632566183.pdfIn PDF document text
    • https://funbugs.ie/files/file/50344193985.pdfIn PDF document text
    • https://macronew.com/upload/files/42184174791.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/6642660a1a38e96b559eda288c80812c/kedesetelemo.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/riwaxazaxolodifopi.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d42f88cfb---27752394798.pdfIn PDF document text
    • https://qkon.ca/images/file/tufekedafibetosekanikuwi.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210908052422.pdfIn PDF document text
    • http://charivne.info/images/file/77351966913.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/nezavavujejemowelaboma.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/goxirogidarax.pdfIn PDF document text
    • http://musik-fachberatung-neumarkt.de/images/uploadedimages/file/jazemidujakufupifupila.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/97472499898.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/60941316406.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/95902795142.pdfIn PDF document text
    • http://wsm.hk/images/files/96541514563.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/liwodefomapujatofeb.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/92317022134.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=sapiens+malayalam+ebookPDF 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_off0000cc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC89 18480 bytes
SHA-256: 205634c24d6e907394782fb330344d51681c4aedc312575635a97e5624057188
font_01_sfnt_off0000fc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11496 10636 bytes
SHA-256: c3994374799d8d8ef129931793d61d83abb148f0ca4dc18690ecbb681b20f1a6

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