Malicious PDF — malware analysis report

Static analysis result for SHA-256 6700b6780788eefb…

MALICIOUS

PDF

77.6 KB Created: 2021-09-07 21:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1863892695602dd4e9ed57f6c663f545 SHA-1: 889c69f81f65d13d314cb35042a3abb196b54e05 SHA-256: 6700b6780788eefb58a79b52da704caff7fe5dbb26adea44864341795222d82d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to act as a link farm, potentially for SEO manipulation or to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://allytemp.ru/uplcv?utm_term=different+theory+of+evolution+pdf PDF link annotation
    • http://greenbiotech.vn/uploads/userfiles/file/lovikatowu.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/buvuwo.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160adad60b6e1f---modalojusugeduxi.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105e08f824a6---77623013927.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/xijiridepipowafojigulo.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb504acfcd6---9276987120.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/dujupejidopu.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f38ab0d2f71---70047019273.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/54e7058deed69023d23ffc145db07a3e/39688086268.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/tbli9oq4aluvl35jsc9tnq0bar/sekev.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/90015203152.pdfIn PDF document text
    • http://naucseto.cz/storage/40040054148.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9653f0554---lowuluporobejemumifivi.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/muzodifugivop.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/lesatemurologami.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/sutowodazifuvojil.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/742684f35d98c8beae6d389f2a3eab79/kodakopoguwula.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/4098812061.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/5691945227.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/pajusenipivezaxalodome.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/25031458173.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/58749177973.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/ribawulinudowamozino.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d05718a3db---xitelerudojowizewowe.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/r1elva5e72oppkqot9vvgd8us4/45218846724.pdfIn PDF document text
    • 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_off0000ce4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4E 10544 bytes
SHA-256: b23df4f9444ebe4b4eba27b6173665e2bfc36236a1e0b280d0f24ac4bd10424a
font_01_sfnt_off0000e637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE637 16640 bytes
SHA-256: b2cdb74ba7f7eca048e6283cddea7966c3eaf401fe27ef9f7b8bde8dd11079c4
font_02_sfnt_off000110b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1