Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e02037c8e9dcc50…

MALICIOUS

PDF

95.3 KB Created: 2021-09-06 08:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6e396bb0f367b4785a3577448b078993 SHA-1: e6af0d9a366d29d22d4e0ec31a4a3a41fa5ddd21 SHA-256: 5e02037c8e9dcc504b55d8f69e4f54a493f17ee63e5aa73fc927f9577183393f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing attack, likely attempting to lure users to download further payloads or provide sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/94613674587.pdf In PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/068e074edc31bd0d83099db04be88ccf/57701300179.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/sopipawi.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160df765db66d7---25226130239.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/jahd9kfn67eavcm07chm1acmla/patudidenefimawizuw.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/85962170231.pdfIn PDF document text
    • http://dlmberatung.ch/userfiles/files/89325194668.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/591ulu0gg9vp51ab240qifoqmi/terulupexigosowona.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210801175631.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/92133295073.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3cd86d9c3---50894692010.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/36666956982.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/6865313924.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608408c5cf590---6964948005.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/wagabapa.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/59462946188.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/zumigu.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/metutifutetufem.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077babb3e375---5939233401.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/6192589094.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/7ad397615594ba65711bb42f62fbb546/41688587355.pdfIn PDF document text
    • http://grupophi.es/uploads/files/pasizenab.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607262a274fe8---26713643866.pdfIn PDF document text
    • https://alibabaoman.com/basefile/alibabaomancom/files/sovoxex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=filosofia+pol%C3%ADtica+na+idade+moderna+pdfPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/787db3ad91ecfcf74621f36df36117d3/24576311460.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_off00010770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10770 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F87 10820 bytes
SHA-256: 64b788b86b04354ffcb8cdeb97426691753bc69a2c6f656e87467c491f9b048a
font_02_sfnt_off0001386b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386B 21200 bytes
SHA-256: 6a996731d59178ebbca817efb7f8a9b722ed4996bbaf4cda033b7dc44a574b6a