Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68d495d74c788f8…

MALICIOUS

PDF

82.6 KB Created: 2021-06-28 12:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d625b86d154ab47606582f8fdd4f15f SHA-1: 84682ebf8b30120e0318580d187e26b877207049 SHA-256: e68d495d74c788f8e1eabb4c28ea25c4ea5f1c356aae2396eb2f03f6f363981d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing to multiple domains, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with exploitation techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a41800086b---84780547293.pdf
    • http://vtvxm.vn/userfiles/file/vivegexutorivudojiva.pdf
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210604015018.pdf
    • http://jnnycc.org/userfiles/file/96740209690.pdf
    • http://fouladsazanco.com/Upload/file/disuvaxukuwebix.pdf
    • https://tractorpulling-emmeloord.nl/upload/file/55461770868.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/7atiugl8qsujtcr20elqe94jr8/parorosovopaluwisukebilod.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160860ee7bdcbd---lafutona.pdf
    • http://jjkxmy.com/upload/files/202106141815288573.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/089c7af79ec2fe762505f245d732e1bd/bumirexipajunadulak.pdf
    • http://xedaptheduc.net/app/webroot/uploads/files/ginitukufi.pdf
    • http://woodwork.pl/ubezpiecz/obrazy/file/85533663682.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/246f2bd33edef3b09fe2f90f02cb5d5a/jikidojewukifisusig.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b10acf2d4d2115c3e7d1a73586ab06d4/88499506834.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/gavixejidegevifezojusigus.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e56770cf7b---xazosoxo.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a777939d362---87324077053.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a197a0b44a---goveminixawusex.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb720925d8a---6876453520.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/dd53e7d3e4f5719421f40ec8b1661d8d/lesugugutiparadelokarerow.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/qrkambqk16ui2hqorebka44930/8596871322.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5c827929a---32999281641.pdf
    • https://travelstore.tn/userfiles/file/13081004728.pdf
    • http://ixtvs.de/_upload_bilder/_filemanager/file/24841265970.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=daily+horoscope+general
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e210.bin
f95cec51aaca9186c8c8a79fea6fc395c3cac7c019871c2d7db85620985ea4fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE210 10672 bytes
font_01_sfnt_off0000fa75.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA75 16792 bytes
font_02_sfnt_off00011287.bin
6f997fbb2ab8efb8fa44149fe5cba6afecd319dede030efc175dcbfeffadfa85
pdf-font-stream PDF embedded font (sfnt) at offset 0x11287 16456 bytes