Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe984e4419357362…

MALICIOUS

PDF

84.1 KB Created: 2021-09-05 21:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 473094407486f1df3a2df46ee4cea7f8 SHA-1: 199bf76f6d82ca73631f7442748448213c613121 SHA-256: fe984e4419357362b6734764958b5b2a6838060f00972be6215b8a9e98f2b1ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the nature of the links and the detection indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160863e93d9a67---wewomesezonedirifogoxup.pdf In PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/2t0jqs9cis4tmio90fnqhdc6he/3083610771.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/1tc6fe1687n5akq4snkdn4a44q/rewalotubonezirelufubepes.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/fabibixuxetepujogupinabob.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e4622ad85be---sujabike.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/1435171900.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/33681842040.pdfIn PDF document text
    • http://hogan1973.com/clients/d/d4/d4eda5e2427b34f3a15374adde9a77da/File/vunugivojozela.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/a6af2ae0ffc4c56365107fd9b7147577/zegolejagebiruw.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/topozoxedemerunurigas.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/fijalopujulu.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/u91t5monbmq2t05h2dp713h65i/tadofewikewelolokat.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbccb928eb---75062918621.pdfIn PDF document text
    • http://1666-3668.com/attach/userfiles/file/53402704540.pdfIn PDF document text
    • http://missinternationalbeauty.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/70723532830.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/488382c693d2c73c80a04bea2c7d7bce/newotepakozizi.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/tujonuxonigoke.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607c02be44b93---1520602549.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/72477935254.pdfIn PDF document text
    • http://stevis.cz/files/file/50989641411.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/05ef88d2186025b067a42ecc232e31ac/bodaxu.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/sofosutonawisabale.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bcb14b681---nefejagopekanidesibigudo.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/81013529397.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=english+worksheet+sicknessPDF 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_off0000e6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDC 10508 bytes
SHA-256: 1a22016849ea4a91b56b16e4170a826e0db127d0455a24f106b99b9436522704
font_02_sfnt_off000116c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C0 17224 bytes
SHA-256: 95310a8766c9cab8589f3be51ed6ba89798a76074116965397a1b4fd881e3b22