Malicious PDF — malware analysis report

Static analysis result for SHA-256 f914c1055a9a35f3…

MALICIOUS

PDF

81.4 KB Created: 2021-09-07 05:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 197270ba8b183de503c55792bde8eb53 SHA-1: 6385bf50b41d366b9859519c8d17c444e8c37636 SHA-256: f914c1055a9a35f34096da45cfd1ef188aaefe7abdfab2e3506daa993fb80c13
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into downloading password-protected archives, a common tactic to evade gateway security. Numerous URLs pointing to compromised CMS upload directories and disposable hosting were extracted, likely serving as download locations for malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da8184b2ef3---76477452882.pdf In PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/ig261064m42g6c78d0p27gno83/38116485453.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/1918918097.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4272526275---jurogife.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bamafurukozituvowetal.pdfIn PDF document text
    • https://aneri12.cz/res/file/vebetibilawabododewojam.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/cb951d492dfc65de485c2346e5bbb7eb/78605529166.pdfIn PDF document text
    • https://siroyensao.com/upload/files/52477541034.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/tofoxiba.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/zerekogemareme.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbdbcc30cf---zasovumivavutigina.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/e09ff9ea56243792ead30ab8e4533280/dajifobatugojutuna.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/nolaro.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/pitutizekizuvos.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/22933306081.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/momisetax.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/29052278304.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/dalugafutewadutijirel.pdfIn PDF document text
    • http://bjjiffy.com/upload/82220609351.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160855700af260---16698152088.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f2d9c8d14---zotegeke.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/gebiwevedudaxezawal.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/fanuz.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/sdqfu08n04hldpada3qjcocgf0/14123475558.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=manually+connect+alexa+to+wifiPDF 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_off0000db75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38C 10456 bytes
SHA-256: 3dfae76ea85add974864376da993007debeed228f9504ad5e7b1f80f5f641fd6
font_02_sfnt_off00010b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7C 17212 bytes
SHA-256: 0c0d84538a0db79305efbd1798979bbc103e0c748f6f7c6dad8e1478045e106e

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