Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71e14a1c2ae2986…

MALICIOUS

PDF

77.7 KB Created: 2021-09-17 23:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c578ec9679ae3f62710ae4408bc64eb4 SHA-1: 0ed90b7b330f909a9499d044a5036a9b0831d801 SHA-256: d71e14a1c2ae2986fc9b21fa40483ee9ba433088f780d822164f4a22cac0bb6d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The embedded JavaScript stream further suggests malicious intent, likely to facilitate the download or execution of a secondary payload. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://chcial.ru/uplcv?utm_term=live+net+cricket+tv+app+download PDF link annotation
    • https://tp-pos.com/uploads/image/files/tudilojatadepatakevox.pdfIn PDF document text
    • http://zeci.nl/im/image/74359620531.pdfIn PDF document text
    • http://motopujcovnateplice.cz/userfiles/file/vevizikemaf.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/zotedotisogobuzavuvo.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210907015121.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/rirudu.pdfIn PDF document text
    • http://video-cycling.de/files/file/53628396352.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/6031e1fcc22ea298dc9d9a4a7ff000d6/23859501585.pdfIn PDF document text
    • https://akemi.ro/hirek/file/44523576866.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/34022670887.pdfIn PDF document text
    • http://pedraferro.com/files/files/11046149376.pdfIn PDF document text
    • https://easresidence.ro/app/webroot/files/userfiles/files/21506096478.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161437d3a0ca61---rifobenalexajeburogibowit.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/14575631607.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/49837571073.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/32596672938.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/24371779792.pdfIn PDF document text
    • http://dakdekkersindex.nl/images/uploads/sivenuvibefidudozoteke.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/buwokutuxas.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/pawoneba.pdfIn PDF document text
    • http://gu-bo.cn/uploads/files/wubaxegugoribosamebiba.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/db72dd4b51faf6f90cd298f46beea367/xulukasowumesobi.pdfIn PDF document text
    • http://slsnn.ru/content/files/kivazewavomugevolerixikis.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/45778047258.pdfIn PDF document text
    • http://contelex.it/userfiles/files/25340872742.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_off0000cb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35D 10540 bytes
SHA-256: 93cf4891df34035d790c57dd6043c6f31bab775f8495f1d12f679e9b66d4a58d
font_02_sfnt_off0000fb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB89 17544 bytes
SHA-256: 591dc2f245c7a0b8e67c5710c4062b6c02c9fe872a5d8140e775c3310832a4c3

Open this report in the interactive analyzer, or submit your own file for analysis.