Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9e73e5abecf5eb…

MALICIOUS

PDF

87.1 KB Created: 2021-08-02 21:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c064ebe329b5897ae3e6999b31bc8490 SHA-1: d9680460ab8b60f54bef27616cd9672bf22a49db SHA-256: cd9e73e5abecf5eb092ac2e617551431f68854405928ecb399bea2dfe6bf7a14
204 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The presence of numerous external URIs, including links to compromised WordPress sites and disposable hosting, suggests a link farm designed to redirect users to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=gta+san+andreas+psp+iso PDF link annotation
    • https://t2sc.me/userfiles/tilizaxojaruzexedizo.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/39346664386.pdfIn PDF document text
    • http://meadspool.com/clients/8/8e/8e46726fd42f39913d2349bbdb4e70c4/File/97078263329.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081f8bab8940---21416563277.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e4c32042b33---2710699918.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/kunufitufagademelafujex.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/47251077602.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/45214789756.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/vobonenurolakejiruxojide.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070482a65921---68101012773.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/af3dfd1f3d473bbf09560c2d4e72c8a0/molewixelegezuviwo.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/42612002688.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/kavipig.pdfIn PDF document text
    • http://williamshudson.org/clients/3/35/35bf74ce48b5c120232fd40fb4fe3e45/File/54899002559.pdfIn PDF document text
    • http://coffee33.ru/archive/file/99401778369.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/61c6d97a104749a8fdb57caeb260a857/96355662838.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/91195497395.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e2e90e19247---38454795257.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/dumofuxorunibitezodo.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/21844179081.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/11160429981.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/poxadawipobimegu.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ddeac8b35---wonojofosez.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160969c5b6d2d3---lepebirerajo.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_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001090c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090C 10376 bytes
SHA-256: 64978825e75527b3f67eec015a6c2c353ad7e817d24ea4e57f39115fb86c3b2e
font_02_sfnt_off000120a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A2 17396 bytes
SHA-256: 56e8f816b36b7ca2611da63cb82029032ad4c8496d5ac4f63953aeeb22b3ee2f

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