Malicious PDF — malware analysis report

Static analysis result for SHA-256 7068e0352a6701a5…

MALICIOUS

PDF

105.3 KB Created: 2021-08-06 13:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5939e540cf93f7ad10154dd4b97d9fa2 SHA-1: e5edaf2d19ef13bba927df579d2f8c0c64abd7b3 SHA-256: 7068e0352a6701a5d75db3e2d47289c4a5bc5ab591f3e31c45232e957b1b2ec2
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, providing no direct user-facing content, but the presence of link farms and compromised hosting indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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://catamma.ru/uplcv?utm_term=how+many+volumes+in+attack+on+titan+manga PDF link annotation
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/bda1463622e8c2603e60d2310b1e3b00/ruvuporelosugaxolaj.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffb520d39e---19260924286.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097888925ce2---98714983257.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/divudobududo.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/megabagi.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/84788667539.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/uibd1qo23ro87gn66t1ibpnnaj/pigaveduw.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/9914496848.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d16ef2fff8---17918502109.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c8faa337b---woxaxinojekefajakugejun.pdfIn PDF document text
    • http://www.heksan.com.pl/file/busesezujafimexikej.pdfIn PDF document text
    • http://dogninja.com/userfiles/files/zenudanixevidujob.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/baruxekojorakorojaxer.pdfIn PDF document text
    • https://quaint-house.com/images/blog//file/vidijugazumenifa.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/c485h3sjesuvrgccdsra4j53de/60220472837.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/69j07kghmrrg4s2ecv0j74ikk7/22742371938.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/kamexumavimum.pdfIn PDF document text
    • https://pellevah.com/upload/files/tedugojimavojaveli.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778e5cc21d2---89987097133.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804f068ff1a---pimifagof.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/rubavexakake.pdfIn PDF document text
    • https://egca.fr/userfiles/file/sobejemabevapoxavikigab.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/27666614104.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-7-13/20210713073510434820.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4C 17596 bytes
SHA-256: 300ff32ab4bbbec7a54c572be5ea8ef4516d6c1e413e7bb4f627f940a321230a
font_01_sfnt_off00011d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D90 10920 bytes
SHA-256: f4ed0f297f1f90ea6ffb35846b3ff5fea51b68c94bb2d96d342b9000f7029737
font_02_sfnt_off000136e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E5 24348 bytes
SHA-256: ece968b5b7004fdaa003f1a1afb5e15ddaa6e8728f74cd4d803b7e6815353de3
font_03_sfnt_off00017ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17ECC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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