Malicious PDF — malware analysis report

Static analysis result for SHA-256 447483747df25a5e…

MALICIOUS

PDF

80.6 KB Created: 2021-06-09 01:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1e0b86a05c5c469b002e95db41006e5a SHA-1: 9997404ddde3412bef8da61bc93447b5ad4506d3 SHA-256: 447483747df25a5e3665b763cfb79ac7b214468b63799bfbda4aaaa8cd53d083
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm used for distributing malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://catamma.ru/uplcv?utm_term=dream+league+2020+offline+download PDF link annotation
    • http://swadeministries.com/pastor-sammy/upload/imagecontent/file/tifixegimobogawubizufapav.pdfIn PDF document text
    • http://cfacgroupe.com/uploads/FCK_files/file/dezuzanelosakisigirifo.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/8d0e1fcb11fd2fb5e344a607fe96e4a3/24525321609.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/73e126f99e1845f6ebc94a0f293da145/83261087769.pdfIn PDF document text
    • http://buildinggodskingdom.com/webcms/file/7712786962.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/narodob.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/4ecc26264dd709b322ca87621221dc5e/65128366525.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8881e1422---polowerifamobiwuxozivona.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d27748891---tomagirijakutubipeloxisax.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e4e0a3f14---81404470846.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/d8f7c3569b8b71d9403c27c00d62763b/filedilugupajejoxeros.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/86935933209.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/pepobikedovaneza.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a44347329b8---supimipireju.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090b717ad755---kolagugifamijojifezawug.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_off0000f061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF061 5416 bytes
SHA-256: 7dc40fa78e9d7021d856d5ab7ab625ab29de5d620d071bbbdf523472ea9e2791
font_01_sfnt_off000102cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CB 23100 bytes
SHA-256: 254bb4d7fb7c476a28658947027ee89faedbb2b6d52f20b9fba9cd3d68c7eacb