Malicious PDF — malware analysis report

Static analysis result for SHA-256 f618d9b02f869da1…

MALICIOUS

PDF

77.0 KB Created: 2021-06-09 07:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3b42a501bdee1cd72758b7f141cdbea3 SHA-1: 0264dd0b0b367e8a625661c669c43dbd3d08cf08 SHA-256: f618d9b02f869da100664f1b95af727f3200d18b9d896829967da9d7b944361c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised CMS uploads and disposable hosting, likely to trick users into downloading a malicious payload disguised as a game. The presence of 'cmd' in the document body suggests potential command execution attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://pistant.ru/uplcv?utm_term=download+very+little+nightmares+android PDF link annotation
    • http://augustaelectricalwork.com/editorData/file/solifemumisiga.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/1sltvjeu7hd7lcu92ftiphb2l7/15694547158.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/3l1d5o42pcs2vte3uu55ep9a24/41713501119.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097989652aee---xozerifuzosovofuveguxeb.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9294cb674f---bawuwogagu.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160adb9b6cd09e---dikidenakalabesavezewemib.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/tinidibekiwepafitisu.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b48bbc63f4e---78744164542.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/ffcb6862f7d75b677324b6a4c6ac00a4/69824216643.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607041107cb19---galevagakamumejutisudo.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/fv62avgfeh53cmd5ab5d4rrlcp/1429350181.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/42890432641.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/dotowe.pdfIn macro / runtime command snippet
    • http://lubrifianti-auto.ro/files/file/vimobanojefen.pdfIn macro / runtime command snippet
    • http://dok-vo.ru/userfiles/file/23068184698.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8c6ca00f8---fapozolesik.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 5492 bytes
SHA-256: 052da4ce4a7f6eb5c2f899dddbc15c668e59e94c08a252d45a596bce31a8b5f2
font_01_sfnt_off000103a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A6 10420 bytes
SHA-256: 7389bb5d05357269672e981d3246c9844864dd7432e116b569df04af2f1964b8

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