Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd10c8a329c2bee3…

MALICIOUS

PDF

84.1 KB Created: 2021-09-21 00:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 43e337b2ee5954118ac09708891c3426 SHA-1: e6db75ea093b3b93a56adffb051f0e1de55012b8 SHA-256: cd10c8a329c2bee356ea2499a868ff688933d0423e5a8222aa3a3b25bca07c59
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, suggesting a link farm designed to host or distribute malicious files. The presence of a 'download button' heuristic and ClamAV detection further supports a malicious phishing or trojan distribution intent. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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://medvor.ru/uplcv?utm_term=happymod+minecraft+apk PDF link annotation
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161438ca4d9af2---vunefuxefagomonuvotakug.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0c9996d69---77815601633.pdfIn PDF document text
    • http://ormansagszive.hu/upload/file/82718597989.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/39159890245.pdfIn PDF document text
    • http://belean.pl/userfiles/file/39819019787.pdfIn PDF document text
    • https://qud27rxl1-k61l.com/contents/files/50496969225.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/sinesotida.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/78635776227.pdfIn PDF document text
    • https://qkon.ca/images/file/83213340215.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/76531502143.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/f165a791455665f856bf2074cd7d72f4.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/fuvoruxisebusikuw.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20219215844082.pdfIn PDF document text
    • http://sergeybazarov.ru/file/45901393403.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210914063624.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613477834d9e4---98691121822.pdfIn PDF document text
    • http://sdes.in/uploads/7220272211.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/timokivekijaluwo.pdfIn PDF document text
    • http://specimport.by/files/files/bekolizutigoxixiwu.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/62574547927.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/41319040062.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/sictbs4ckkic213n8tpgp1kknc/sukoxovexunek.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/tidewilab.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/38343673629.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_off0000e105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE105 10764 bytes
SHA-256: 7594fe7811db626b6104adf139835acd4bd5d124a35825f5c94b9d528ca66028
font_01_sfnt_off0000f9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 18988 bytes
SHA-256: 5bd4e92107dbe7193d8bb477d5a14c917933693466847076f1245ddbb4b64112
font_02_sfnt_off00012b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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