Malicious PDF — malware analysis report

Static analysis result for SHA-256 47141938dcacfa5f…

MALICIOUS

PDF

93.1 KB Created: 2021-07-26 02:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 658e9eda6cc26159cf3d99ddfd121c19 SHA-1: 2bd6d3f308500cff96f3950e2cbde9e107de345c SHA-256: 47141938dcacfa5f793874e6889562f9445250fdeb195883d504ae9b5f2a611e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple compromised WordPress sites, likely serving as a lure or distribution point for further malicious activity. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d20b462bcb---xeroj.pdf In PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/ujbf29mhdc1qmj7ggkvnms5lmc/zotosimemafusa.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48fc3314e5---risenifagujatixunow.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16087c2895d18a---61938622053.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edc0d6d9805---kitiwov.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/409c2cc015fef26e6974ef9829c52b4e/77549824723.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98e204db9---zozujezotev.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/moluwaxigewinuperebugatam.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/56349268595.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608083ac5d255---wupenaxititosarabinafuwa.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/fufamo.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/51674639510.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160760339dee80---68910479697.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/359a84c15b2c053e0b630899631c2b33/kanatanopetabowezegiv.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/kudopijakotipuledu.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/weparatalokuxuwowumida.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b74550985bc---27315596323.pdfIn PDF document text
    • http://contelex.it/userfiles/files/45610264930.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdad1062b39---18379542705.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/pijabiziwapigigefeli.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/boridufumevigekogebomok.pdfIn PDF document text
    • https://badercool.com/userfiles/file/tosezonakiw.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/sazavelilul.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0fc287cbc---57106636878.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+much+does+a+hand+car+wash+costPDF 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_off000109a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B6 17052 bytes
SHA-256: 805208e432b105afca1e1ab3d06a5220e01866a5aa653b5dae6c5d8197c566de
font_02_sfnt_off00014e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E5E 10676 bytes
SHA-256: 0c88bc650ddfcf854c58e9647f909522f1cb664830064cc8660b00b67be2bb75

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