Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2aae95a7edda439…

MALICIOUS

PDF

84.6 KB Created: 2021-09-07 14:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0faa746d338e97b3e72bba80ea668fa6 SHA-1: 5f5372cc878490d3d80b877bbb105e146ec51e58 SHA-256: d2aae95a7edda43953b01bb47a2d9f629894650c42e72bd08937d08e5767ba0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV also detecting it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/41gai1ja3qdpthmokmdra2k6jp/kuzifez.pdf In PDF document text
    • https://eletmodguru.hu/files/files/rufadegikij.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/mijimo.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16072354d8af01---gepupururabesovaragafaj.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///13416594295.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210812000133_b5g12h.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/ditetuxipokoraxid.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/65012573400.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/nafig.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f47af1b9083968b42c3faabfbf0de313/18696870536.pdfIn PDF document text
    • http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/34761951400.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071f97eb7bb7---15270315191.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/8f6846d703b9b4b0ef0141da54c6cf83/59140568771.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/40550813517.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16091cc9a60d1f---87062876699.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/d8a7e7d66e1289021c22e48dda0875ca/wokakurofomasexevili.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/57900916354.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e04f6665967---zegakixezopimoxiber.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/rufuvamex.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/85271012599.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb3623e6bf---7927894419.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/055309c6273cd7e0bee00cfce5dd8381/mawejosexujimisemusota.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/unipasj5o77uelmdc2sff6e3be/26696528625.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/fetiwuruzodiluxijux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=4th+grade+synonyms+and+antonyms+worksheetsPDF 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_off0000e672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE672 10828 bytes
SHA-256: 34b44663ff113e9471fb927652b69857f60d90bf360170ad52a9c2a0909846ce
font_01_sfnt_off0000ff2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001173d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173D 17452 bytes
SHA-256: 927914120ab39869c125f0778e8d65a0763c7d97c42eec39455282259c97bf0d

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