Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddeff2e096ddff66…

MALICIOUS

PDF

90.4 KB Created: 2021-07-15 20:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 946b28825371b1cc223400d2de55f994 SHA-1: de705b6179a186ddbe617bf4b2fde13829666d5b SHA-256: ddeff2e096ddff660a229bd898b1422daa018666d8335bba349b0c71b1a792c4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URIs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/55896621463.pdf In PDF document text
    • http://cfacgroupe.com/uploads/FCK_files/file/pikevonojevasiminosebatif.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/81351270121.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/korudakidavufebubopumadu.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/d0d71a76843d5a4032fe27410ac207f9/nivedutene.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd65e960aa---fulikop.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160806a8c6c5ef---59079627698.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/52219842.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/269b319d102070eaf0a9ffc083c1219e/dopejazoguzuluk.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/mufevaxa.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/1211318532.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/aa1c48905348541c6769d44e59b1d028/kiwuxejelenev.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/dasebogaxil.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3848eaca1---tadoxenorurozedina.pdfIn PDF document text
    • http://meechoktoolmart.com/user_img/files/lofizudu.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/fntooovfs3ji81b2jk483n1oj1/jifigusovofupagotiw.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/vovovoneberudubare.pdfIn PDF document text
    • https://purefeeling8.com/data/file/xupolabijizomomaxif.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/6te8iutoqd3ill9dp1kfs7kb0o/reladapibodowatixul.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/3n01vrsodecftgktkbdtgoumbi/vesunadojivarekomox.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/934a7c3461097ef4f9534cb89d130a6c/55917862090.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/32658925202.pdfPDF link annotation
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/u8p9tgdm0lhbvb9sq5tvujo3k3/6328494231.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=indigenous+youth+servicesPDF 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_off0000fb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2F 10672 bytes
SHA-256: 098c1318c286edd5c9e2a0f7e1df166478b9f65527382a0c3a901116190518a4
font_01_sfnt_off0001136f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136F 18060 bytes
SHA-256: 82b2ce3ff2d1e724ccab4e09973fd9737d16a08e7c455be14dd4c35649dfda66
font_02_sfnt_off000142ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1