Malicious PDF — malware analysis report

Static analysis result for SHA-256 a84ef75b7b88c2a4…

MALICIOUS

PDF

75.4 KB Created: 2021-06-13 01:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8961933b75e6fd843404397723b6295d SHA-1: 3f2bd6dae9c43db0323a7243dd845e4a5d33d1d7 SHA-256: a84ef75b7b88c2a4d46da8096abeb5a91d296ea3b5269218a0008ef1b1505c7e
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple compromised WordPress sites, directing users to download files. The primary lure appears to be 'beach buggy racing apk unlimited money', suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=beach+buggy+racing+apk+unlimited+money PDF link annotation
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887038ea292---68492082750.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/94051485eac04b42ece51e7a3d6fd1f2/leraberexerataza.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/1b0c1c37e25a0127c84a9f0bb7b2b4c7/17283654141.pdfIn PDF document text
    • https://bataretak.com/img/files/file/4965963725.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210612155436.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c3bee0722---13323526825.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/bujofoviravikojoputexe.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/64818129121.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d430ce2d28---mopor.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fa6bdb8f6---lavekorewazo.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d4cdc2cff---38201483970.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098959d7e665---jubinatekanadumuge.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16075c908698ae---pupexawigakim.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5cbf34464---68266487303.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/885293babe312e90d8c2877d331efa13/wofogudakej.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/figumowegokewozawona.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/fezuwezazerofu.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/ed536dc13b64d889b0f6ce1df307302e/19038781236.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_off0000deb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB2 5664 bytes
SHA-256: d4ba3d19b01c37e932d0e410c9a674a0b0ff88c8cbfd5d57b94cb26538911d5d
font_01_sfnt_off0000f1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D4 20708 bytes
SHA-256: b1b299d21be03e7fedf08bb33fd2aa4d0acc8cac069d0630dd32735ad40aa4c9