Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d667a68221f1cc…

MALICIOUS

PDF

84.8 KB Created: 2021-08-24 07:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 44247b7b6a963deb224db48f6036eb93 SHA-1: 47679a31b549afdd76fe2090a9a91435c31d766d SHA-256: 80d667a68221f1cc4ecc39ab426d6cf172833ac2c18ec38477b883094f2d7916
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. This suggests an attempt to distribute malware or conduct phishing by leveraging these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3149586e1---tamututitusuwenavezuk.pdf In PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4831dc3913---63760273779.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098446700380---lirasekaxegez.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/0ve81gorqe45e05r3v5vv4tpvk/35220016493.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/bd89b785634a0793be41f7ed3b2e50e7/52155987386.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/lonan.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/fotajiwanebip.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/67375907274.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/xopexirogimi.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/d6573205e4a5fcc532b51784a10a19d0/wulokinegepirevoledezez.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607201f05c5bf---xeroxitip.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/70412853320.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16078f6e05cfec---70808333958.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/dinonewedu.pdfIn PDF document text
    • https://blogsma.com/files/78807304526.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/nepudumivogokatudesa.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/81176062380.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/widiwejokokefubu.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/29279509142.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/77833390845.pdfIn PDF document text
    • http://gptools.net/userfiles/file/xofalubaxadeno.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/rb1sngk9p55k9cls4fpvgtrs5i/satevuliluvowekusamav.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/44174163614.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+the+best+app+to+learn+koreanPDF 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_off0000eb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB12 10576 bytes
SHA-256: 5fcc93e3e2b5a38e563f08c0cb286ae4ac90095778eceeaf4739efdc8d8d21c2
font_01_sfnt_off000102ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EF 16356 bytes
SHA-256: 098198f2637817e728059b2a1f390d4d2865a7ed546671011e1ff06469368b9d
font_02_sfnt_off00012d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1