Malicious PDF — malware analysis report

Static analysis result for SHA-256 f900cfe34e896f2a…

MALICIOUS

PDF

87.5 KB Created: 2021-09-04 03:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d1bdd27060594a820ec9682eebd5c6e2 SHA-1: 9a92f09ce033162dc949268afb75d104bafd1a30 SHA-256: f900cfe34e896f2a52b15c9f15ad587ad035690609d91e2082d64f9cf6398e09
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The primary purpose is likely to direct users to malicious sites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=maurice+genevoix+raboliot+pdf PDF link annotation
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/79461999125.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7bc9def8890e099e612033148c39d8b2/zusenedovovigama.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/vajakataneb.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/35659473092.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/6491c46c32db6ec311f24c552f62dc3b/gofomipoga.pdfIn PDF document text
    • http://www.77ice.com/upload/files/73167446771.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d6683c4e7---nirupelazubeloxawujewek.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d10e84f96---68260470399.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/barefoj.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/773788afe9ac20342f797665f1a6c4f6/sisefuloxovazitakarak.pdfIn PDF document text
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/56980174055.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/kirupaxopijoxupeziripaguv.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089cf1fb646b---66781466822.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/vigowated.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/fekukub.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/sofebifilasafulevu.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f73c69325d1---39367399364.pdfIn PDF document text
    • http://cmcthailand.com/ckfinder/userfiles/files/65645262552.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/85409720459.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/i6gg2hd0pndf4emkstjqmfn4q5/kotutiwopugamisibewamus.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/24380800408.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/kajovoxiwuzisujefavawep.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a0de5258c---rovuwakunajosinurilijebef.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_off0000ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 19484 bytes
SHA-256: a188fbf478c5584d3c3fbfc8335d6f1b4fc853247e6c8b5b607677beea624e1f
font_01_sfnt_off00011f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F15 11028 bytes
SHA-256: 2edbac9697a2e64b1079adf9932306653795e6ef3da094ad356b249176262ae5
font_02_sfnt_off00013874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13874 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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