Malicious PDF — malware analysis report

Static analysis result for SHA-256 3283e01b21d053b2…

MALICIOUS

PDF

84.7 KB Created: 2021-07-15 20:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 202b375424945337a26f1f70152f9a43 SHA-1: f142ed02ac7bf89d715930ae4d3c262b238bee97 SHA-256: 3283e01b21d053b2347e8ae88dec4e847c776a73dc6ffbf6d0ad0fb253ce47e6
176 Risk Score

Malware Insights

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

The PDF file was detected 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 URLs, including one hosted on a raw IP address. These links are likely used to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://baobihungphu.com/media/ftp/file/gatiremedukatebegukot.pdf In PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/8ccf651acce1b71343e67d9cfa4c4c02/11174630530.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cde5953914---xexepigoxafiraduted.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afddf0a459---27538412825.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/jejijomiwopunavopok.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/32784957814.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/13b938f8d198f97845fdc9e818611300/jepilujuluf.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/74031243716.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a317a3544ce---xozosij.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7972305ced---fodovemuj.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/a6c6f53d48ea6180b6e1534c89314177/loleka.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/miludazemunadata.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b01ba944057---gizibopegoku.pdfPDF link annotation
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/5178c8b5155f71fb9d51c449d6c57a5b/80279073232.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/579f40d6f67532bcc6611aca03a66302/riwemi.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094dd7cc6d48---levakebenezowoduwekulaz.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/91237185377.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16092a2e8ecbcd---54454419538.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/xijitonimajokurezu.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/53589963689.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/67235465918.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/vewoda.pdfIn PDF document text
    • http://altinay-law.com/images/file/42388463544.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc02b79146---xogotamumatawusivov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=types+of+fluctuationPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001036d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036D 10552 bytes
SHA-256: f46a9651e147bc2b486eb964d4932f076cdb9f679a806ce974da12717c1658d5
font_02_sfnt_off00011bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAB 16224 bytes
SHA-256: 12c4f4de15fb3d94ff0501c0ac0c24c57e4d6ee1e9e906e9aa8484981bf3f2a1

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