Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec5886801ac47de…

MALICIOUS

PDF

97.2 KB Created: 2021-09-07 08:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1ab2fd37fbcc41e7dcfb3065d56b1903 SHA-1: 7c3956896605640941dadc3e6967441bf1ab1a04 SHA-256: 1ec5886801ac47dee9a8a2c9560b05399f2dfebfd9071ba1d7ce0a474c61a05f
156 Risk Score

Malware Insights

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

The file was detected as malicious by multiple heuristics and a machine learning classifier, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and other domains, suggesting a phishing or malware distribution campaign. The presence of external URI links and link farm patterns indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://crysiq.ru/uplcv?utm_term=storytelling+livro+pdf+download PDF link annotation
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e18f122130a---vugexizavize.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609525c9bcadc---99259223540.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/71175260651.pdfIn PDF document text
    • http://aps-mes.com/files/file/jesewesuworipotukorakaf.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/47869683024.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/fosutuwadagalukazagik.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/17116adf994075ef0ef535651f704107/28982356501.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/xipag.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/tawivigevuweliragumiba.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/aa1ae17ea11f25e95744e6dd3a162f9d/xirebegesirefibopotene.pdfIn PDF document text
    • https://perfectprojects.ro/userfiles/file/30354585424.pdfIn PDF document text
    • https://ka-base.no/images_content/file/29318644205.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085069bd9f53---begowudisegu.pdfIn PDF document text
    • https://khogiaydantuonghanquoc.com/images/news/file/radomugobeso.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/baef63a7613c48432152fd1c11563a52/63685118920.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160edd5585abaa---karokodapagevapozap.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/p8sthpevn38rhd902662iusc61/jiwepogumemakilomik.pdfIn PDF document text
    • http://4bx.pl/public/file/dunofomudilenape.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/54113821622.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/77733588222.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/f3ebf874f3e0fa99ab495c967849b688/96481459001.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001158a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9C 18180 bytes
SHA-256: 1be806b9cc92b3f1d3fb63aee622724673f525b1a79a498c4346ba0fe5da8791
font_02_sfnt_off00015c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C7E 10848 bytes
SHA-256: fb2355e492d9da86692591144e677060c877b9de24143542c5e42b7e1f2b3f90

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