Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc311294a8d46820…

MALICIOUS

PDF

73.8 KB Created: 2021-03-29 18:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e69e948355d76a888ac43248959a36fe SHA-1: 5a6eb0930ccad2aa3ddf94a6038889dcc394d0ed SHA-256: fc311294a8d46820248fa78bc1b04afe33a9e141830ae9256c3329892a1f1fbf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://midufefew.ru/wix?keyword=1990+nissan+300zx+factory+service+manual PDF link annotation
    • http://disupata.iblogger.org/barbara_cartland_espaol.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/bosch_300_series_stackable_washer_and_dryer.pdfIn PDF document text
    • https://lokamafurixese.weebly.com/uploads/1/3/4/5/134509290/sofiwo.pdfIn PDF document text
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/tijomaxuvaxeludidaz.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/melasinudesozesezifubago.pdfIn PDF document text
    • https://pogunokele.weebly.com/uploads/1/3/0/7/130739789/3816546.pdfIn PDF document text
    • http://accface.in/15009192016poutj.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/graphing_equations_of_lines_worksheet.pdfIn PDF document text
    • http://biniwitovo.mywebcommunity.org/how_much_is_toyota_sienna_in_nigeria.pdfIn PDF document text
    • https://vebexedupatad.weebly.com/uploads/1/3/2/7/132740253/1967191.pdfIn PDF document text
    • http://gidpopiteru.com/66343539131akkg0.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/xuweroresobomorifizera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454673/normal_600b31e946e1b.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/bilanzen_richtig_lesen.pdfIn PDF document text
    • https://nesotufofiwin.weebly.com/uploads/1/3/1/3/131381712/dezilojebevosi-rogegatipome-negonapokime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_6041b24c85840.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zusobudem.epizy.com/nodinano.pdfIn PDF document text
    • http://gusagokasu.epizy.com/59158482857.pdfIn PDF document text
    • http://jinizegujez.rf.gd/gozabesolevudevax.pdfIn PDF document text
    • http://desigaweru.myartsonline.com/ashrae_standard_62.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_off0000e090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE090 5728 bytes
SHA-256: 8d6f537084a64701faa119575805ef3cb59c8f4b9dd07be05265fd370cad8f8f
font_01_sfnt_off0000f418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF418 11268 bytes
SHA-256: 8a73f321fa8b3639dba2779fca787fd48cbb1f5bb700127e9dacfd9ddda54ad5

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