Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d1d5c55d29f06a…

MALICIOUS

PDF

96.2 KB Created: 2021-08-10 21:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8aa4b11a99fbeee65393395d91391287 SHA-1: 092b1876bbb8a45d9ea5cd38e3ebf5cb32cfdb71 SHA-256: e0d1d5c55d29f06af259355d2fb73ac94679c91d580c91291be23069fbe33826
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5754001b36---pomusunodebevuti.pdf In PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/9416c10e1bb1ac7743564ac14697823f/ponisarujomisipiduzakawug.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3ceb8d762---lozidev.pdfIn PDF document text
    • http://webbuilders.com/files/file/11681016994.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/4klvn2k3b7md6fnvfilhb3vtc9/pomivirijaja.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3f6169a0f---97001640916.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ee256beb9cf---liliduvawotodiruxaze.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/notizitexolubokawokilufi.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/44915587187.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/30341908643.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f34557d9030---piwemululopapixixo.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/770464c0b75c77d28bf73162920c9382/bisawatefotekixemesozuno.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/ntt2fkhiudmjj98l0thrbj93fi/zagejotifawesijatesewim.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/mitatu.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/b54586e12a40ad73aca1a9e8cd3b2157/daribewusexileruw.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160804d2e8d81d---buresakowoxowe.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5358c271e6---nuwiketatototajizilak.pdfIn PDF document text
    • http://agriturismofattorialucciano.com/ckfinder/userfiles/files/nasobikalexanadorikam.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/wikajuxo.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/30647208456.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/tidajezobusiwi.pdfIn PDF document text
    • http://tms-operation.com/upload/files/rapewibaxi.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/m2nfpd17s634b7at76f66ht759/45965363416.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/tk07u8pduokubt9rh1o0ah8em2/88369394908.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/5204086846.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+write+a+discussion+section+researchPDF 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_off000114ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EA 10600 bytes
SHA-256: 5a3c64adce35378fbe18d19e0265e65e08f521fb2e3c6b0a0d4b38a410949537
font_01_sfnt_off00012d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001452b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452B 16800 bytes
SHA-256: 4f01917158edbf6a6aca3c2614b25ea37cd5fcda4e182154481e93a7073abc63