Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b8997b1a747b36d…

MALICIOUS

PDF

74.6 KB Created: 2021-08-27 23:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 944ca6b011e4060557eb06c4e1e37780 SHA-1: cb3406a34e67e760bdf5c82edce8907bae5868d8 SHA-256: 6b8997b1a747b36dab2456b67cf69c022c035bfec1aa1bc8a614406511409a73
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution campaign. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating attempts to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c441de5bb---75769387642.pdf In PDF document text
    • http://studiosantese.eu/userfiles/files/zixobelotogedoxanutupi.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/394b402151590b07f4c0caf611f9e454/kimijafutujewegikug.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/s121rb4rkenmjnt3dqvmnv6kj7/gunexagegekilitodizosat.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1c72d06d5---18580755610.pdfIn PDF document text
    • http://stevis.cz/files/file/84666596822.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/cec759cdf18d9ec341048339c97cc3ae/pabobirepefumutor.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/xixubudemalevivofos.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/c04vq1ppj02ekur3r8h76i7ehm/pulur.pdfIn PDF document text
    • https://adikketiga.com/contents//files/wifikiruwen.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba67d15ed31---46535724224.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/28901918595.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/janipobe.pdfIn PDF document text
    • http://jogamiskolc.hu/ckfinder/userfiles/files/33205313903.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/24874710356.pdfIn PDF document text
    • http://maksimetall.ru/files/bolinepumirinasipele.pdfIn PDF document text
    • https://krossi.ru/images/content/files/tizetujidotarijilepawi.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/pamireluv.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/65368481479.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/jezifelisirularaja.pdfIn PDF document text
    • https://alariel.be/userfiles/file/nuliduvugirabu.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a757a04f672---waxaxor.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/72472578390.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=south+africa+footballPDF 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_off0000bf2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD741 10344 bytes
SHA-256: dd51a9124d65d7a4e19e12556e945a16a081361d0b4a8432c2abb21a45c1ca8e
font_02_sfnt_off0000eeb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 18000 bytes
SHA-256: 09a65da6bd7e4a0dd4291cf565eb677cccdb75b28f993a91f495aa87bcd8c6e7

Open this report in the interactive analyzer, or submit your own file for analysis.