Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f27ea4119712d1…

MALICIOUS

PDF

80.1 KB Created: 2021-06-21 08:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: cd98ae6a8560caefae521013f0d71578 SHA-1: 61f920d93f95d61d6a8e2d9813eb488d0e6f46ab SHA-256: d8f27ea4119712d13cce2365779e00311b94355c0ae67ba2cdc72f8a4f8e3bf3
204 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, aiming to trick users into downloading a payload. It contains multiple external links, some pointing to compromised CMS upload storage, and includes a 'download button' lure. The presence of password instructions for an archive further suggests an attempt to conceal malicious content, likely a second-stage downloader or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=devil+may+cry+4+trainer+dx9 PDF link annotation
    • http://anhuishangbiao.com/upload_fck/file/2021-6-13/20210613203828346219.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/jmumncdp0amokidt643gmh7hp7/sopodoxifirezisujiloti.pdfIn PDF document text
    • http://avonsteel.com/UserFiles/file/kodipelasisonabigezimaro.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e90be79f6---63890179571.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/tebusoweja.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/95771611a31ee1c5f4a0cfa27466d716/69801752428.pdfIn PDF document text
    • https://carlojans.com/cms/file/70890863197.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021051208175973499.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16090bda843ebe---vofoduwenesidavosig.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e11ac761c---fipavozul.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/e0957d02963dff7e70bdf891c7470cc4/nepatemijolos.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f4006f26---33768123326.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file/%5C/nupasakokevex.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b49e5b29d47---lutijetenevijunamanum.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/69543040792.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8B 3400 bytes
SHA-256: bc63ae462ab746375ef51e0fea0aefa4aee9cb046ba39399fa218d3c82ef6410
font_01_sfnt_off0000f6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BA 5380 bytes
SHA-256: 6982962502ee7e041c911fb1ea1734bb61a7dcec0a620625dcb96b7e8ea4680b
font_02_sfnt_off00010911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10911 12532 bytes
SHA-256: ed539a1a86935cfb11a6ae0235241347342c4e9ee08a239f667d3c7e0e772c1a

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