Malicious PDF — malware analysis report

Static analysis result for SHA-256 7314f6cf200c6fa3…

MALICIOUS

PDF

72.0 KB Created: 2021-06-19 08:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6ad8b2237e61b92b5a86b30eb48d125c SHA-1: 1256b68f6e3a105b06c0ec9eb14f5307d0592274 SHA-256: 7314f6cf200c6fa3f9478d71c39fd763af4320083c56d331ad047851f124eb26
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/6ea94bee34c05e4c656b11fa2ba5e001/42567663741.pdf In PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/489699e8075edda4448cf53059f4f90a/timowidizarur.pdfIn PDF document text
    • http://alltechsro.cz/files/9959215005.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/delenejitevi.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/730sgcdakue71nespgp75bsmtc/kevaroxapoxobinir.pdfIn PDF document text
    • http://polish-house.com/uploades/fckeditorfile/23672964857.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/busixanoxefuv.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a282b68fff9---77024767233.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/4baf2d3a5320421d4da8439b6d1e1234/pavijajose.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/9rr81ib5jhm00hksgb50bqjic5/renenojisam.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/debabikep.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1c54313c9---67603379017.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/fazubakig.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/mn9dsp6sfi0ulb0cngrogc6ich/fukesuguxebiwuvareveligul.pdfIn PDF document text
    • http://capri.lt/userfiles/files/29766412804.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ac06f3905---56480888720.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160779c1c58ed9---jusurabavoxime.pdfIn PDF document text
    • https://mszukam.pl/dat//file/86875679245.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/dabedifediteniwil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=sun+raha+hai+shreya+ghoshal+lyricsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA8 5268 bytes
SHA-256: 96e6f3345b188d4fb5c10c7ae000e3cfdb918e5251dacac25135c2920382d2d1
font_01_sfnt_off0000de8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8F 12332 bytes
SHA-256: 4b070ba0862391eec64f91b5a4aff396471bbc24cc09fd263bc8432a906bb84c
font_02_sfnt_off000106d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D6 3192 bytes
SHA-256: 6b7213070562c8f7887759a711f1ecb276a491a871d96738952c991563cf85ac