Malicious PDF — malware analysis report

Static analysis result for SHA-256 62514dde1422b062…

MALICIOUS

PDF

83.8 KB Created: 2021-08-27 06:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c2f4008dd29eadaba80aeaec70dd3631 SHA-1: 0f7c7646076453ce5285eab5e1dfb7b4818ed6a7 SHA-256: 62514dde1422b0624598a1c1fbf81fcf0cc702a5dc31fbef087aa70b32864fc4
196 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external URIs pointing to various domains, some of which are associated with compromised CMS uploads or disposable hosting. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the overall structure and URL distribution suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://charmingcurls.se/upload/file/mumubatarixegolunofesek.pdf In PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161283ac1d39a6---9599050013.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/cae64a56e94628f575a0eda59912c245/vixisoxufebavivuneboxose.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/64053101417.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210804080348_pm7pzr.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-07-27/images/files/50792364923.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/woxelewolozev.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/tamagozasajetot.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/sipirusok.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/21548646584.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/41233387797.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a2775c972de---77782641746.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160da80c619a0d---rutonafijen.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/rejow.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/64194428049.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/c948ed41b36165eb1240cad01e6f8f12/vagikela.pdfIn PDF document text
    • http://supragyn.cz/userfiles/file/kesegomixola.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071af46baf18---xipajevupovor.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/pojegijilulodozukete.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/06/file/81445104676.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/gefifimub.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/wizazabimefuna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+is+a+grain+of+wheatPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/ddc11de9471c70e3a2f80cf1a37ca7f3/239491120.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_off0000e594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE594 10524 bytes
SHA-256: 3eb0748700d8fac111311632b823ed13efcc88701003589f8d0fe385c8b7c6c5
font_01_sfnt_off0000fd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A9 16680 bytes
SHA-256: d6d0e7daf62874d2ee3ef49f80bab3974cb83e0709ab9fc38970b9721e8f7fda

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