Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cba72a9910d6b99…

MALICIOUS

PDF

80.3 KB Created: 2021-07-19 00:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 253ddb7436f49120af5bdfc03d96bdd6 SHA-1: eedf730c4adc2ae28bcf92d690a5e4c8bb865ef0 SHA-256: 5cba72a9910d6b9951afea99b90b90acad8927ba87850c5fa49015fc8133a0b8
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b49fe39e8d---jamaj.pdf In PDF document text
    • http://cbgnfinance.com/userfiles/file/dulazajebakob.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/negamorigegojirekidododi.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16099ccfa48306---57155185193.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/7vc304q38jn3thtnb761706tv7/85919108.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/a70b0ef7042af5b9f5cfdffba9f004bb/23497243656.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/8659257523.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///dokuwiterewuwozanigagovo.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6b38b2d83---72619571863.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607825393706a---lufuzonuduxomav.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/0a8a795becc16ee9e1ec4eb7fdd279af/kopapirigeliwas.pdfIn PDF document text
    • https://koreayokogawa.com/ckfinder/userfiles/files/57122705732.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a359ef8491e---jasolu.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608654de8e2d5---medutebixajixox.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/33f9253fdb40de97589c697b85d4246b/55153214175.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/sotowiromaxumol.pdfIn PDF document text
    • https://gangnampools.com/contents//files/60725656003.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/62104492093.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/92635065685.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/jawiwo.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/10895696735.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=coc+how+to+unlock+super+troopsPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 16764 bytes
SHA-256: 9f88480759b9fc35df20dd0004b3c04bce4d720de428e8af2382b9fdf10421a8
font_02_sfnt_off00011a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A72 10528 bytes
SHA-256: 32e5bb9fe5210dcd35b80b683e70510cdf69e2a591cdcd3bcffed81575089a17

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