Malicious PDF — malware analysis report

Static analysis result for SHA-256 458bef649a288c49…

MALICIOUS

PDF

76.7 KB Created: 2021-06-20 02:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7e2ae92f1c393b65adaf798c8b8375d9 SHA-1: ba9b4a4e4a49cbc7f7f00c3d2687fb6f56b5ef2d SHA-256: 458bef649a288c49f068e78de1e91a6bbcb20420e9d7b82922f38078cab616e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised websites and disposable hosting, likely to manipulate search engine results or redirect users to malicious content. The presence of multiple links to compromised WordPress uploads and the use of formcraft/super-forms plugins suggest a pattern of exploiting vulnerable web infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0abd7d4565---14373569733.pdf In PDF document text
    • http://gdlianyu.com/uploadfiles/file/5133616352.pdfIn PDF document text
    • http://short-story.ru/upload/file/87967916449.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/8c519a820941db04b4fe88ec3d5f7ea4/29000969953.pdfIn PDF document text
    • http://infunplastic.com/d/files/54180978047.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/bme5cmk9bdllhapijhqq255nbt/29255443244.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abec528e400---fusuwo.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/rcg478pe7c9d3nbfljtsa4ea0l/paloxokesabeserazus.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/31d01d9d7afb970c6682dc915115c062/pixobetu.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8bc0a2a70---78807579888.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/44094423632.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2d086b82d---86934205232.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/k1uiv15s3gni5ckeuu2glib7e9/wanejawanukazenidepanumam.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1aeb3a29c---63415557029.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202106182107193079.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/70287188756.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/c6c75e23b646f3e480fa5c1cc8580a87/88474635203.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/xedifixavemo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=ib+learner+profile+report+card+commentsPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 5380 bytes
SHA-256: 4f215e1ebf236d795c3f35704f7a522ee12f66d188ac7598c64d6fb27f07bc69
font_01_sfnt_off000100d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 10668 bytes
SHA-256: 10eb71efc13cc91804b1a4ff67f1d309c39471a0f805f612c7028403b23e03f1