Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67200f25936c4ea…

MALICIOUS

PDF

89.6 KB Created: 2021-09-16 16:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7c64fd526a7840f68354c70f41d2229a SHA-1: 1fe98da6ccaa3a0da2f843f837fc762cf7316e67 SHA-256: f67200f25936c4eacf36ce3a9873a0a16a4ec55848dfbe1870f665d841e2a793
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • 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.
  • 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://archism.ru/uplcv?utm_term=music+player+apk+download PDF link annotation
    • http://xaydunglenguyen.vn/upload/files/82a241.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/zeneledubofilutixorixisu.pdfIn PDF document text
    • https://stl-log.com/htdocs/cljr/data/files/12134279949.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/pojov.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/83874617212.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/70170209820.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/lugabeneduvogilikem.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/pakidebokonixa.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/3b6abfcdd83cddfed62f0aaf1863fa5c/xivalotaguwegimet.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/28779659487.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1630632370.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/65682585214.pdfIn PDF document text
    • https://enilubricantvn.hoakhanh.vn/uploads/image/files/botofotomisi.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/79565387858.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/fisinopajelibiweboxofow.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/19734540114.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/ca4dc0e6a89e4b7b5bf3d2e0f9fbef36/xevunigomodivigubini.pdfIn PDF document text
    • https://invest.pl/userfiles/file/71058494370.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/zemulate.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/50122738520.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1614009db6b33a---72327221630.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/melexekipulofedila.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/20401704113.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/gorapuforarak.pdfIn PDF document text
    • https://spacio.hk/attachment/file/42999717579.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_off0000f6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 18908 bytes
SHA-256: 14060289febfe9f6932e4a35e11ffe6a74c4b66bd8c7a31ec0bb6ede1d18a6e1
font_01_sfnt_off000127e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E9 10796 bytes
SHA-256: 7640855f70d6d194f0e367b2bfca936f9877166e17cb82aef33a4c000722e27d
font_02_sfnt_off000140f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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