Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1358f94aa113219…

MALICIOUS

PDF

71.8 KB Created: 2021-09-28 20:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3e7399c856fa78b30d13d08a89e36ea0 SHA-1: 7cc771cae12293571e63fd5238aae7e46d27833f SHA-256: c1358f94aa113219810fb8655c1ea3e2d8236b2f4716ee3d67c47573c19bffcd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to suspicious domains, suggesting it functions as a link farm or phishing lure. The PDF structure and heuristic firings indicate it is designed to redirect users to external content, potentially for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://eptesteplelek.com/uploads/file/gigusolatabavevev.pdf In PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/53477001994.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021090612093675.pdfIn PDF document text
    • http://tg-focus.ru/userfiles/files/67567171997.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/4a5327551d429faf73645b108188b48c/58913165413.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/woledamipemodetonivagofiz.pdfIn PDF document text
    • https://jensbrode.de/files/file/99397722648.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1632799364.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/82383582405.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/wozowixeginorajuxojutasid.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/78077635339.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148519b6cce3---vafutofob.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/84555583297.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/80294653824.pdfIn PDF document text
    • https://unosms.us/userfiles/file/lomodonisufilu.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/25705308819.pdfIn PDF document text
    • http://eva.am/files/78d361324ff057b0.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/vopunimawarevur.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/90688197649.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/57601236937.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/70288397173.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/fujobe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=nba+live+mobile+unlimited+coins+apkPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD98 15444 bytes
SHA-256: 2017091f990546b180372ec020344e4f478dc6ad7f9cd3d3678dfa5898c78850
font_01_sfnt_off0000d48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48E 2132 bytes
SHA-256: 8ad1629d78958631526aea0a74d0b163a5252944052d54f78beed5240939c1a1
font_02_sfnt_off0000de35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0000f64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 10948 bytes
SHA-256: 4c6cf5891c0195db278529d47fbc11950084ddd3f70c9445c165bda9b5a6307b

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