Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1303ed608c0775e…

MALICIOUS

PDF

88.1 KB Created: 2021-07-27 05:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 59cb9c29352baf65772dcb20be02b4da SHA-1: 2586c95d446c4c8f9e8de0383e0af89feeb5d2ea SHA-256: e1303ed608c0775e315f0482eb49b89f49f938e832b2d56191f784e37c39c745
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojanized PDF. The embedded JavaScript likely facilitates the redirection to malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/fa68f8cfcab545b2e3f5427d1ca8e3a1/nelegimazukisomu.pdf In PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/1k519a38g3qvoulcrnhps6ksls/25889793558.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160788deb7f8c6---reloraligiguw.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/binokijosu.pdfIn PDF document text
    • http://donghocasiochinhhang.net/uploads/userfiles/file/fowazobojuro.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/18911658114.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/jiretemuduvuteb.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/mfa15ffuh0p2r1pusg4esc6g2h/60066279687.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/7d853a61b867c195d74e41a37c147690/17494936530.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/mepokabinama.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/20215122215168974.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/96084213301.pdfIn PDF document text
    • http://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/radugisenefaxak.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/kakowigolutipotu.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/28989472089.pdfPDF link annotation
    • http://voszveszprem.hu/_user/file/96687748691.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/dd69e43c9655cfb8810590451454bac4/serido.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609f59abc69e5---1483119056.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/rh9b33b43eu5ck18rifakdr227/pipej.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/9fa953bbf91a4291655a76c826f4be30/30976995147.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/69883764016.pdfIn PDF document text
    • http://atya.eu/files/file/26666811555.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b784de05f5d---14204157384.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=l%27oeil+du+loup+questions+r%C3%A9ponsesPDF 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_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10909 19000 bytes
SHA-256: eca4b4b4c6139fbd101a79d7b4933d3597efb7cd8d588a92c0c74f5b59c30431
font_02_sfnt_off000137eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137EB 10612 bytes
SHA-256: 3866bebe1ab7e757b49f8195026fbbc7574222d6e7b082c4ce1f35402759d686