Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f43b6f8c2b569cd…

MALICIOUS

PDF

67.5 KB Created: 2021-06-05 23:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 661d3c1798404b43db468af07487af50 SHA-1: f848ab999ea09e6afb6ee869f7dec9e9686b5743 SHA-256: 9f43b6f8c2b569cd9e8890375e38f06fff55da7981210847bd01f10e5c8f515c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains embedded JavaScript and multiple external URLs, many pointing to compromised WordPress sites. The document body, though partially garbled, suggests a lure related to financial transactions. The embedded JavaScript likely facilitates the redirection to malicious URLs or the download of further payloads, consistent with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 https://allytemp.ru/uplcv?utm_term=how+to+fill+out+a+chase+bank+deposit+slip PDF link annotation
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/b14c1d2aee9ab98d21a3fa20f7842c95/lomobegudasuvojopolusetil.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/c7f69933b045963ec814b49bc4b6ba30/63150136604.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/fb7c6079dab98bd5179533fe5ee48ad4/tazovakirufojabagibusewi.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/kazozoferuximaxipuwi.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a888298b5c---nupubuxofoda.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/55145678452.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/nabozibejupitib.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/dv9c4eklf6jlhu58eei95ckfr6/newezoda.pdfIn PDF document text
    • https://classicandcamper.co.uk/wp-content/plugins/super-forms/uploads/php/files/u84u3engt85vsq259si1svr2i0/22208716251.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/4b7n5rni0defq6tinjhofu34f8/nuzuliwewivutafisadixuder.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/f7bc9982e1a4be02a2a7c57eba487a21/zivovavajukowedetupu.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/fuvejijon.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/13084735789.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/xixojefurigunasajidedirox.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/3826141b1da570c02d29feca2c0882a9/polumedigavogeja.pdfIn PDF document text
    • http://ekotronic.eu/files/file/kavedomibasi.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077783b6a2ca---9471607779.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBA 5404 bytes
SHA-256: 660e117cd4bc4081ad7ef0467333caa2c4cb13df1a44b184a80e42c9034de733
font_01_sfnt_off0000df28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF28 9876 bytes
SHA-256: 32290a06110b58e04f9900d48e67ccc4fb20456ee2fcd050642f1004cc464c70