Malicious PDF — malware analysis report

Static analysis result for SHA-256 78152795a908ffba…

MALICIOUS

PDF

85.7 KB Created: 2021-09-17 23:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: d04cc709d5a92a6cc0672f0152bf2b9c SHA-1: 65f0d627a2b8c1d5bb0b03fa11e4b35b594aeb49 SHA-256: 78152795a908ffbae7d3e07695f201d97231996f737317df99828ac98129e940
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of a malicious document used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://crysiq.ru/uplcv?utm_term=bbm+on+android+phones PDF link annotation
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a15ecefad0---23347619776.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/zixiw.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/wufavaxexali.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/50533169916.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/fepepajofodovazogari.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/sibaperirozajaxidofoma.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/japelopesegumodunetu.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/37777878597.pdfIn PDF document text
    • http://wsm.hk/images/files/86866821892.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/garujo.pdfIn PDF document text
    • https://magnanelli.com/userfiles/file/nuwawipinebevujew.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wunipiwu.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/zezasofoxevenadu.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140f902ad55e---58142849958.pdfIn PDF document text
    • http://northcity.rs/slike/files/20493866714.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/bifinezukepukizur.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/gesajajuser.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/85411894847.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/regeboni.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/48142777925.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/48895883765.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614012a1d346f---56226959652.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/zelobuvebozafad.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109122337053639.pdfIn PDF document text
    • http://normel.org/files/upload/file/38484555612.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/lajifepupaluj.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_off0000eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 17620 bytes
SHA-256: 1dfeaf00c7353ffe93c3bf692f53bb5dd61098a0f6368306346eeae516157784
font_01_sfnt_off000118e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F8 10704 bytes
SHA-256: 69643c746779eaed78ddbe42cb94dbf04f164d76187ebc6731facecee0f31c2f

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