Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed47a7fecd5dce23…

MALICIOUS

PDF

68.5 KB Created: 2020-12-22 21:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 226e663c12ff0c028512a5929c502741 SHA-1: 46e95189303f66085c975bde0925f5cee28c85f3 SHA-256: ed47a7fecd5dce2310a0fe3ae8ddbc259b754ec1476b1235f2bc5fdc6debf608
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware sites. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs are indicative of malicious activity.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafficel.ru/aws?utm_term=public+administration+reforms+in+sri+lanka PDF link annotation
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/3596945.pdfIn PDF document text
    • https://fozokixudaxo.weebly.com/uploads/1/3/4/3/134355354/sigukidi.pdfIn PDF document text
    • https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/5256902.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/musimuwabotafiw.pdfIn PDF document text
    • https://vexepediv.weebly.com/uploads/1/3/4/6/134668456/zufajogejop.pdfIn PDF document text
    • https://tafuposavibado.weebly.com/uploads/1/3/4/0/134017079/vopemijifujebagude.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/buwixugapelanirog.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/wizitipabokuzadoxonemob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de9fce61-b229-4014-b251-153cb1c17d45/86445485591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f29c26-6ef3-4eb8-a21f-9efb10c75002/98597890377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba11f44-cae4-4af7-aed0-1ba5301a8f3f/64252770453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51afccf-9fb9-4d6f-bf07-6c51946aff33/silomuvilasolorajopozat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d910b092-e027-48ad-813c-c22a1e5cb3e8/mukapuwobemukexezajafe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ca9c17e7202640030589/t/5fc68dccf8cdb769c6c825ca/1606847948518/2535755383.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ccd688c99b6d37b395bd/t/5fc8a2b56652ad59ec2db625/1606984378939/nunasuzovorujuzatuxidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5cecdb3-8712-48ad-8a32-738589f98abd/70280716978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b200143-d6b2-422b-b9ac-4e741108f00c/jixepitizuranegiritoz.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA3 5372 bytes
SHA-256: 92feebef77bf1299e5440ce5eff7e65f09088edd8fd850303f5b85e93ad1b12d
font_01_sfnt_off0000e0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D0 10516 bytes
SHA-256: bcf9a2d241639255e41ede89f9919d50d10b6d57b4afe81df8be241e6655a095

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