Malicious PDF — malware analysis report

Static analysis result for SHA-256 fede9df362f00d7c…

MALICIOUS

PDF

73.5 KB Created: 2021-06-09 05:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 96bbbb312ec399b4258962f581fed617 SHA-1: 81d5a42324778e2d8059f12c25805f2fa0bfcdc3 SHA-256: fede9df362f00d7c5279369b7d99e9d74a5198756263333baff5a6f751403e32
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains references to 'critical analysis' and 'tintern abbey', likely serving as a lure to direct users to malicious or spam-related websites. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9511

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://wastran.ru/pbw?utm_term=critical+analysis+of+tintern+abbey PDF link annotation
    • https://dojobojijiwum.weebly.com/uploads/1/3/2/6/132681334/4113149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_601677f11b64f.pdfIn PDF document text
    • https://xumogaveranowiw.weebly.com/uploads/1/3/4/3/134371782/fobakenujere.pdfIn PDF document text
    • https://selikiwomutarew.weebly.com/uploads/1/3/5/3/135329437/jezeru.pdfIn PDF document text
    • https://diziwupufetut.weebly.com/uploads/1/3/4/4/134477772/bosixu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380079/normal_601407a6c7bf2.pdfIn PDF document text
    • https://garovinarabibaf.weebly.com/uploads/1/3/5/2/135293384/ropavuboxuwigu_dadima_pigegugel.pdfIn PDF document text
    • https://wokugosag.weebly.com/uploads/1/3/4/3/134339956/zedaputelowam.pdfIn PDF document text
    • https://rudabukonavapuk.weebly.com/uploads/1/3/4/0/134016662/7457336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476943/normal_60432f4ee3007.pdfIn PDF document text
    • https://doxipawuno.weebly.com/uploads/1/3/2/6/132682924/wijuxezebiwexa.pdfIn PDF document text
    • https://jodulimije.weebly.com/uploads/1/3/4/7/134732884/7299831.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f79f9442-c49c-4603-89e9-1af9fe5c76cc/11407550108.pdfIn PDF document text
    • http://kuduwoxux.pbworks.com/w/file/fetch/144726039/tiruxejeniliwolikuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d89a046-8f84-4303-b112-2d98a329491f/harry_potter_fanfiction_hermione_and_adrian_pucey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0020c733-1052-4dd1-ae6d-c534f54b45b1/knowledge_base_management_system_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c40f58-1e2a-468e-9bd4-0dcdd0ec573a/6414166233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df26169c-2c6f-43b6-bbe2-c50afc8dfa97/mavelilozen.pdfIn PDF document text
    • http://gowisiru.pbworks.com/w/file/fetch/144815721/74229840928.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144574632/society_of_righteous_and_harmonious_fists_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7abd62d3-7162-4c80-acc9-3ab154480930/elementary_linear_algebra_anton_10th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db30334-a350-4936-98c5-60cbfbaac961/fundamentos_de_qumica_hein_arena_15_edicin.pdfIn 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_off0000ed22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED22 5020 bytes
SHA-256: 138982164aab02828991c2a18af9e0b0cb99ed828368fbd8d7dfe84e1f03a0c8
font_01_sfnt_off0000fe49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE49 11108 bytes
SHA-256: 258141ed77deeacfed89322f99411eaada173e0593b4fc8f047a8aae602f5588